SUPERCONDUCTOR TECHNOLOGIES INC
SC 13D/A, 1998-10-08
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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               SECURITIES AND EXCHANGE COMMISSION
                     Washington D.C.  20549
                                
                          SCHEDULE 13D
                        Amendment No. 4
                                
                                
           Under the Securities Exchange Act of 1934
                                
                                
               SUPERCONDUCTOR TECHNOLOGIES, INC.
                        (Name of Issuer)
                                
                                
                 Common Stock, $0.001 par value
                 (Title of Class of Securities)
                                
                                
                           867931107
                         (CUSIP Number)
                                
                                
                    H. Vaughan Blaxter, III
                      1900 Grant Building
                 Pittsburgh, Pennsylvania 15219
                                
                         (412) 281-2620
         (Name, address and telephone number of person
       authorized to receive notices and communications)
                                
                       September 2, 1998
     Date of Event which Requires Filing of this Statement


If the filing person has previously filed a statement on Schedule 13G to 
report the acquisition which is the subject of this statement, and is filing 
this statement because of Rule 13d-1(e), 13d-1(f) or 13(d)-1(g), check the
following box            [ X ]



<PAGE>
<PAGE>
CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     C. G. GREFENSTETTE, Trustee for Various Trusts     I.D. ####-##-####

2    Check the Appropriate Box if Member of a Group  (a)  [ X]  (b)[   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                             [       ]

6    Citizenship or Place of Organization
     U.S.

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     5,000

8    Shared Voting Power
     3,703,333

9.   Sole Dispositive Power
     5,000

10   Shared Dispositive Power
     3,703,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     3,708,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     35.17%

14   Type of Reporting Person
     IN
<PAGE>
CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above
     Person

     THOMAS G. BIGLEY, Trustee for Various Trusts     I.D. #

2    Check the Appropriate Box if Member of a Group (a)  [ X ]  (b)  [  ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     U.S.

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     10,000

8    Shared Voting Power
     248,000

9.   Sole Dispositive Power
     10,000

10   Shared Dispositive Power
     248,000

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     258,000

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     2.45%

14   Type of Reporting Person
     IN
<PAGE>
CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     THOMAS G. BIGLEY AND C. G. GREFENSTETTE, TRUSTEES UNDER
     AGREEMENT OF TRUST DATED 12/30/76 FOR THE CHILDREN OF JULIET
     LEA HILLMAN SIMONDS                         I.D. #25-6193084

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]     (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     112,000

8    Shared Voting Power

9.   Sole Dispositive Power
     112,000

10   Shared Dispositive Power

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     112,000

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     1.06%

14   Type of Reporting Person
     OO
<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above Person

     THOMAS G. BIGLEY AND C. G. GREFENSTETTE, TRUSTEES UNDER
     AGREEMENT OF TRUST DATED 12/30/76 FOR THE CHILDREN OF AUDREY
     HILLMAN FISHER                         I.D. #25-6193085

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]   (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     112,000

8    Shared Voting Power

9.   Sole Dispositive Power
     112,000

10   Shared Dispositive Power

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     112,000

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     1.06%

14   Type of Reporting Person
     OO
<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above Person

     THOMAS G. BIGLEY AND C. G. GREFENSTETTE, TRUSTEES UNDER
     AGREEMENT OF TRUST DATED 12/30/76 FOR THE CHILDREN OF HENRY
     LEA HILLMAN, JR.                         I.D. #26=6193086

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]   (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     112,000

8    Shared Voting Power

9.   Sole Dispositive Power
     112,000

10   Shared Dispositive Power

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     112,000

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     1.06%

14   Type of Reporting Person
     OO
<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above Person

     THOMAS G. BIGLEY AND C. G. GREFENSTETTE, TRUSTEES UNDER
     AGREEMENT OF TRUST DATED 12/30/76 FOR THE CHILDREN OF WILLIAM
     TALBOTT HILLMAN                      I.D. #25-6193087

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]   (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     112,000

8    Shared Voting Power

9.   Sole Dispositive Power
     112,000

10   Shared Dispositive Power

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     112,000

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     1.06%

14   Type of Reporting Person
     OO
<PAGE>
CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     HENRY L. HILLMAN                                I.D. ####-##-####

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]     (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     U.S.

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power

8    Shared Voting Power
     3,255,333

9    Sole Dispositive Power

10   Shared Dispositive Power
     3,255,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     3,255,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     30.88%

14   Type of Reporting Person
     IN

<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above Person

     ELSIE HILLIARD HILLMAN                       I.D. ####-##-####

2    Check the Appropriate Box if Member of a Group   a)  [ X ]     (b)  [  ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     U.S.

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power

8    Shared Voting Power
     3,255,333

9    Sole Dispositive Power

10   Shared Dispositive Power
     3,255,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     3,255,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     30.88%

14   Type of Reporting Person
     IN

<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above
     Person
     HENRY L. HILLMAN, ELSIE HILLIARD HILLMAN & C. G. GREFENSTETTE,
     TRUSTEES OF THE HENRY L. HILLMAN TRUST U/A DATED NOVEMBER
     18, 1985                                I.D. #18-2145466

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]    (b)  [  ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     
8    Shared Voting Power
     3,255,333

9    Sole Dispositive Power

10   Shared Dispositive Power
     3,255,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     3,255,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     30.88%

14   Type of Reporting Person
     OO

<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     THE HILLMAN COMPANY                            I.D. #25-1011286

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]     (b)  [  ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Pennsylvania

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power

8    Shared Voting Power
     2,819,333

9    Sole Dispositive Power

10   Shared Dispositive Power
     2,819,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     2,819,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     26.74%

14   Type of Reporting Person
     CO

<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     WILMINGTON INVESTMENTS, INC.                 I.D. #51-0344688

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]     (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Delaware

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power

8    Shared Voting Power
     2,819,333

9    Sole Dispositive Power

10   Shared Dispositive Power
     2,819,333

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     2,819,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     26.74%

14   Type of Reporting Person
     CO

<PAGE>

CUSIP NO. 867931107

1    Name of Reporting Person S.S. or I.R.S. Identification No. of above 
     Person

     WILMINGTON SECURITIES, INC.                      I.D. #51-0114700

2    Check the Appropriate Box if Member of a Group   (a)  [ X ]     (b)  [   ]

3    SEC Use Only

4    Source of Funds
     OO

5    Check if Disclosure of Legal Proceedings is Required Pursuant to 
     Items 2(d) or 2(e)                                   [       ]

6    Citizenship or Place of Organization
     Delaware

Number of Shares Beneficially Owned by Each Reporting Person With

7    Sole Voting Power
     2,819,333

8    Shared Voting Power

9    Sole Dispositive Power
     2,819,333

10   Shared Dispositive Power

11   Aggregate Amount Beneficially Owned by Each Reporting Person
     2,819,333

12   Check Box if the Aggregate Amount in Row (11) Excludes Certain Shares

13   Percent of Class Represented by Amount in Row (11)
     26.74%

14   Type of Reporting Person
     CO

<PAGE>

                          SCHEDULE 13D


     This statement ("Statement") constitutes the Schedule 13D filed with the
Securities and Exchange Commission (the "Commission") on October 8, 1998 (the
"Filing").

Item 1.  Security and Issuer

     This Statement relates to the Common Stock, $0.001 par value, of
Superconductor Technologies, Inc., a Delaware corporation (the "Issuer").  The
address of the principal executive offices of the Issuer is 460 Ward Drive,
Suite F, Santa Barbara, California 93111-2310.  The Common Stock is quoted on
the Nasdaq National Market under the symbol "SCON".

Item 2.  Identity and Background

     (a)  Names of persons filing (individually, the "Registrant" and
collectively, the "Registrants"):

          Wilmington Securities, Inc., a wholly-owned subsidiary of
          Wilmington Investments, Inc.

          Wilmington Investments, Inc., a wholly-owned subsidiary of
          The Hillman Company.

          The Hillman Company, a corporation controlled by Henry L.
          Hillman, Elsie Hilliard Hillman and C. G. Grefenstette,
          as Trustees of the Henry L. Hillman Trust U/A dated
          November 18, 1985.

          Henry L. Hillman, Elsie Hilliard Hillman and C. G.
          Grefenstette, Trustees of the Henry L. Hillman Trust U/A
          dated November 18, 1985 (the "Henry L. Hillman Trust").

          Thomas G. Bigley and C. G. Grefenstette, Trustees Under Agreement
          of Trust Dated 12/30/76 for the Children of Juliet Lea Hillman Simonds
          (the " JLHS 1976 Trust").

          Thomas G. Bigley and C. G. Grefenstette, Trustees Under Agreement
          of Trust Dated 12/30/76 for the Children of Audrey Hillman Fisher
          (the "AHF 1976 Trust").

          Thomas G. Bigley and C. G. Grefenstette, Trustees Under Agreement
          of Trust Dated 12/30/76 for the Children of Henry Lea Hillman, Jr.
          (the "HLH Jr. 1976 Trust")

          Thomas G. Bigley and C. G. Grefenstette, Trustees Under Agreement
          of Trust Dated 12/30/76 for the Children of William Talbott Hillman
          (the "WTH 1976 Trust").

          C. G. Grefenstette

          Thomas G. Bigley

          Henry L. Hillman

          Elsie Hilliard Hillman

          The name, position, business address and citizenship of each director
and executive officer of the entities listed above, each controlling person of
such entities and each director and executive officer of any person or
corporation in control of said entities, is attached hereto as Exhibit 1.

     (b)  Business Address

          The addresses of the Registrants are as follows:

          The Hillman Company, the Henry L. Hillman Trust, the JLHS 1976 Trust,
          the AHF 1976 Trust, the HLH Jr. 1976 Trust and the WTH 1976 Trust
          are each located at:
          1900 Grant Building
          Pittsburgh, Pennsylvania 15219

          Wilmington Securities, Inc. and Wilmington Investments, Inc.
          are each located at:
          824 Market Street, Suite 900
          Wilmington, Delaware 19801

          C. G. Grefenstette
          2000 Grant Building
          Pittsburgh, Pennsylvania 15219

          Thomas G. Bigley
          One Oxford Centre
          28th Floor
          Pittsburgh, Pennsylvania 15219

          Henry L. Hillman
          2000 Grant Building
          Pittsburgh, Pennsylvania 15219

          Elsie Hilliard Hillman
          2000 Grant Building
          Pittsburgh, Pennsylvania 15219

     (c)  Principal occupation or employment

          The principal occupations of the corporations, listed in response to
          Item 2(a) are: diversified investments and operations.

          The principal occupation of the Henry L. Hillman Trust is: diversified
          investments and operations.

          The principal occupation of the JLHS 1976 Trust is: diversified
          investments and operations.

          The principal occupation of the AHF 1976 Trust is: diversified
          investments and operations.

          The principal occupation of the HLH Jr. 1976 Trust is: diversified
          investments and operations.

          The principal occupation of the WTH 1976 Trust is: diversified
          investments and operations.

          C. G. Grefenstette
          See Exhibit 1

          Thomas G. Bigley
          See Exhibit 1

          Henry L. Hillman
          See Exhibit 1

          Elsie Hilliard Hillman
          See Exhibit 1

     (d)  Criminal convictions

          None of the persons named in Item 2(a)(including Exhibit 1)
          have been convicted in a criminal proceeding in the last five years.

     (e)  Civil proceedings

          None of the persons listed in response to Item 2(a) (including 
          Exhibit 1) have in the last five years been subject to a judgment,
          decree or final order as described in Item 2, subsection (e) of
          Schedule 13D.

     (f)  Citizenship

          Wilmington Securities, Inc. and Wilmington Investments, Inc. are
          Delaware corporations.

          The Hillman Company is a Pennsylvania corporation.

          The Henry L. Hillman Trust, the JLHS 1976 Trust, the AHF 1976 Trust,
          the HLH Jr. 1976 Trust and the WTH 1976 Trust are Pennsylvania trusts.

          C. G. Grefenstette, Thomas G. Bigley, Henry L. Hillman and Elsie
          Hilliard Hillman are U.S. citizens.

Item 3.  Source and Amount of Funds or Other Consideration

          None.

Item 4.  Purpose of Transaction

     On July 31, 1998 Thomas G. Bigley purchased 7,000 shares of Common Stock
in the open market for $37,625.

     On August 3, 1998 Thomas G. Bigley purchased 3,000 shares of Common Stock
in the open market for $16,125.

          Except as set forth above and in Item 6 below, the Registrants have no
present plans or proposals which relate to or would result in (a) the
acquisition by any person of additional securities of the Issuer or the
disposition of securities of the Issuer, (b) an extraordinarycorporate
transaction, such as a merger, reorganization, or liquidation involving the
Issuer or any of its subsidiaries, (c) a sale or transfer of a material
amount of the assets of the Issuer or any of its subsidiaries, (d) any change in
the present Board of Directors or Management of the Issuer including any plans
or proposals to change the number or term of Directors or to fill any existing
vacancies on the Board, (e) any material change in the present capitalization or
dividend policy of the Issuer, (f) any other material change in the Issuer's
business or corporate structure, (g) changes in the Issuer's charter, by-laws or
instruments corresponding thereto or other actions which may impede the
acquisition of control of the Issuer by any person, (h) causing a class of
securities of the Issuer to be delisted from a national securities exchange or 
to cease to be authorized to be quoted in an inter-dealer quotation system of a
registered national securities association, (i) a class of equity securities of
the Issuer becoming eligible for termination of registration pursuant to Section
12(g)(4) of the Act of 1933, or (j) any action similar to those enumerated
above.

Item 5.  Interest in Securities of the Issuer

     (a)  Beneficial Ownership

          5,000 shares of Common Stock are owned of record and 
          beneficially by C. G. Grefenstette.

          10,000 shares of Common Stock are owned of record and
          beneficially by Thomas G. Bigley.

          775,000 shares of Common Stock are owned of record and
          beneficially by Wilmington Securities, Inc.  Wilmington
          Securities, Inc. also owns 645,833 shares of Series A Preferred
          Stock which are convertible into 1,291,666 shares of Common
          Stock.  Wilmington Securities, Inc. owns 125,000 shares of Series
          A-1 Preferred Stock which are convertible into 250,000 shares of
          Common Stock.  Wilmington Securities, Inc. owns 150,000 shares of
          Series B Preferred Stock which are convertible into 300,000 shares
          of Common Stock.  Wilmington Securities, Inc. owns a Warrant for 
          100,000 shares of Common Stock, a Warrant for 66,667 shares of 
          Common Stock and a Warrant for 36,000 shares of Common Stock.

          100,000 shares of Common Stock are owned of record and
          beneficially by the Henry L. Hillman Trust.  The Henry L Hillman Trust
          owns 150,000 shares of Series B Preferred Stock which are convertible
          into 300,000 shares of Common Stock and a Warrant for 36,000 shares of
          Common Stock.

          The JLHS 1976 Trust owns 50,000 shares of Series B Preferred Stock 
          which are convertible into 100,000 shares of Common Stock and a
          Warrant for 12,000 shares of Common Stock.

          The AHF 1976 Trust owns 50,000 shares of Series B Preferred Stock
          which are convertible into 100,000 shares of Common Stock and a
          Warrant for 12,000 shares of Common Stock.

          The HLH Jr. 1976 Trust owns 50,000 shares of Series B Preferred Stock 
          which are convertible into 100,000 shares of Common Stock and a
          Warrant for 12,000 shares of Common Stock.

          The WTH 1976 Trust owns 50,000 shares of Series B Preferred Stock
          which are convertible into 100,000 shares of Common Stock and a
          Warrant for 12,000 shares of Common Stock.

     (b)  Power to Vote or Dispose of Shares

          Each person listed above in response to Item 5(a) has the sole power
          to vote and to direct the vote and the sole power to dispose of and
          direct the disposition of those shares except as follows:

          (i)  Wilmington Investments, Inc., The Hillman Company, Henry L. 
               Hillman, as settlor and Trustee of the Henry L. Hillman Trust,
               and Elsie Hilliard Hillman and C. G. Grefenstette, as Trustees of
               the Henry L. Hillman Trust, may be deemed to share voting and 
               disposition power regarding 2,819,333 shares of Common Stock
               held beneficially by Wilmington Securities, Inc.


          (ii) Henry L. Hillman, as settlor and Trustee of the Henry L. Hillman 
               Trust, and Elsie Hilliard Hillman and C. G. Grefenstette, as 
               Trustees of the Henry L. Hillman Trust, may be deemed to share 
               voting and disposition power regarding 436,000 shares of Common 
               Stock held beneficially by the Henry L. Hillman Trust.

          (iii) As trustees of the JLHS 1976 Trust, the AHF 1976 Trust, the
                HLH Jr. 1976 Trust and the WTH 1976 Trust Thomas G. Bigley and
                C. G. Grefenstette may be deemed to share voting and disposition
                power regarding 448,000 shares of Common Stock held beneficially
                by the JLHS 1976 Trust, the AHF 1976 Trust, the HLH Jr. 1976 
                Trust and the WTH 1976 Trust.


     (c), (d) and (e).  Not applicable.


Item 6.  Contracts, Arrangements, Understandings or Relationships With Respect
to Securities of the Issuer.

     None



Item 7.  Material to be Filed as Exhibits

     Exhibit 1.     Information concerning officers and directors of reporting 
                    persons and certain affiliates thereof.




                           SIGNATURES

     After reasonable inquiry and to the best of my knowledge and belief, I 
certify that the information set forth in this statement is true, complete and
correct.

                         WILMINGTON SECURITIES, INC.


                              /s/ Andrew H. McQuarrie
                         By _________________________________________
                              Andrew H. McQuarrie, Vice President

                         WILMINGTON INVESTMENTS, INC.


                              /s/ Andrew H. McQuarrie
                         By _________________________________________
                              Andrew H. McQuarrie, Vice President

                         THE HILLMAN COMPANY


                              /s/ Lawrence M. Wagner
                         By _________________________________________
                              Lawrence M. Wagner, President

                         HENRY L. HILLMAN, ELSIE HILLIARD HILLMAN
                         & C. G. GREFENSTETTE, TRUSTEES OF THE HENRY
                         L. HILLMAN TRUST U/A DATED NOVEMBER 18,
                         1985


                              /s/ C. G. Grefenstette
                         By _________________________________________
                              C. G. Grefenstette, Trustee


                         THOMAS G. BIGLEY AND C. G. GREFENSTETTE,
                         TRUSTEES UNDER AGREEMENT OF TRUST DATED
                         12/30/76 FOR THE CHILDREN OF JULIET LEA
                         HILLMAN SIMONDS, AUDREY HILLIARD HILLMAN
                         HENRY LEA HILLMAN, JR., AND WILLIAM
                         TALBOTT HILLMAN

                         /s/ Thomas G. Bigley
                         ____________________________________________
                         Thomas G. Bigley, Trustee

                         /s/ C. G. Grefenstette
                         ____________________________________________
                         C. G. Grefenstette, Trustee


                         /s/ C. G. Grefenstette
                         ____________________________________________
                         C. G. Grefenstette


                         /s/ Thomas G. Bigley
                         ____________________________________________
                         Thomas G. Bigley


                         /s/ Henry L. Hillman
                         ____________________________________________
                         Henry L. Hillman




                         /s/ Elsie Hilliard Hillman
                         ____________________________________________
                         Elsie Hilliard Hillman 


October 8, 1998
       Date



                            EXHIBIT 1

PRINCIPAL OFFICERS AND DIRECTORS OF
THE HILLMAN COMPANY, ALL OF WHOM ARE U.S. CITIZENS

Name and Address                   Title

Henry L. Hillman                   Chairman of the Executive Committee
2000 Grant Building                and Director
Pittsburgh, Pennsylvania 15219

C. G. Grefenstette                 Chairman of the Board and
2000 Grant Building                Director
Pittsburgh, Pennsylvania 15219

Lawrence M. Wagner                 President, Chief Executive Officer
2000 Grant Building                and Director
Pittsburgh, Pennsylvania 15219

H. Vaughan Blaxter, III            Vice President, Secretary, General
1900 Grant Building                Counsel and Director
Pittsburgh, Pennsylvania 15219

Mark J. Laskow                     Vice President and Director
1900 Grant Building
Pittsburgh, Pennsylvania 15219

Anthony J. Burlando                Vice President - Risk Management
1900 Grant Building
Pittsburgh, Pennsylvania 15219

James R. Philp                     Vice President - Personnel and
2000 Grant Building                Administration
Pittsburgh, Pennsylvania 15219

Richard M. Johnston                Vice President - Investments and
2000 Grant Building                Director
Pittsburgh, Pennsylvania 15219

John W. Hall                       Vice President - Accounting and
1800 Grant Building                Information Services
Pittsburgh, Pennsylvania 15219

<PAGE>
Timothy O. Fisher                 Vice President
1900 Grant Building
Pittsburgh, Pennsylvania 15219

Bruce I. Crocker                   Vice President
1800 Grant Building
Pittsburgh, Pennsylvania 15219

Denis P. McCarthy                  Vice President
1900 Grant Building
Pittsburgh, Pennsylvania 15219

Timothy P. Hall                    Vice President
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Joseph C. Manzinger                Vice President
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Maurice J. White                   Vice President, Shareholder Services
1800 Grant Building
Pittsburgh, Pennsylvania 15219

Charles H. Bracken, Jr.            Treasurer
2000 Grant Building
Pittsburgh, Pennsylvania 15219

D. Richard Roesch                  Assistant Treasurer
1800 Grant Building
Pittsburgh, Pennsylvania 15219 

Michael S. Adamcyk                 Assistant Secretary and
2000 Grant Building                Assistant Treasurer
Pittsburgh, Pennsylvania 15219 

Mary Black Strong                  Assistant Treasurer
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Carol J. Cusick Riley              Vice President, Associate General
1900 Grant Building                Counsel and Assistant Secretary
Pittsburgh, Pennsylvania 15219 


Cornel Conley                      Controller - Corporate
1800 Grant Building
Pittsburgh, Pennsylvania 15219

Mark M. Poljak                     Controller - Taxes
1800 Grant Building
Pittsburgh, Pennsylvania 15219

Elsie H. Hillman                   Director
2000 Grant Building
Pittsburgh, Pennsylvania 15219 

William Talbott Hillman            Director
2000 Grant Building
Pittsburgh, Pennsylvania 15219


PRINCIPAL OFFICERS AND DIRECTORS OF
WILMINGTON INVESTMENTS, INC., ALL OF WHOM ARE U.S. CITIZENS

H. Vaughan Blaxter, III            President and Secretary
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Lario M. Marini                    Senior Vice President and Director
100 South Road
Wilmington, Delaware 19809

Andrew H. McQuarrie                Vice President, Chief Financial
824 Market Street, Suite 900       Officer, Treasurer and Director
Wilmington, Delaware 19801

Richard H. Brown                   Assistant Vice President and
824 Market Street, Suite 900       Assistant Secretary
Wilmington, Delaware 19801

Charles H. Bracken, Jr.            Assistant Secretary and
2000 Grant Building                Assistant Treasurer
Pittsburgh, Pennsylvania 15219

Jody B. Cosner                     Assistant Secretary
824 Market Street, Suite 900
Wilmington, Delaware 19801


Joan E. Bachner                    Assistant Treasurer
824 Market Street, Suite 900
Wilmington, Delaware 19801

Darlene Clarke                     Director
4911 Birch Circle
Wilmington, Delaware 19808


PRINCIPAL OFFICERS AND DIRECTORS OF
WILMINGTON SECURITIES, INC., ALL OF WHOM ARE U.S. CITIZENS

H. Vaughan Blaxter, III            President and Secretary
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Lario M. Marini                    Senior Vice President and Director
100 South Road
Wilmington, Delaware 19809

Andrew H. McQuarrie                Vice President, Chief Financial
824 Market Street, Suite 900       Officer, Treasurer and Director
Wilmington, Delaware 19801

Richard H. Brown                   Assistant Vice President and
824 Market Street, Suite 900       Assistant Secretary
Wilmington, Delaware 19801

Charles H. Bracken, Jr.            Assistant Secretary and
2000 Grant Building                Assistant Treasurer
Pittsburgh, Pennsylvania 15219

Jody B. Cosner                     Assistant Secretary
824 Market Street, Suite 900
Wilmington, Delaware 19801

Joan E. Bachner                    Assistant Treasurer
824 Market Street, Suite 900
Wilmington, Delaware 19801

Darlene Clarke                     Director
4911 Birch Circle
Wilmington, Delaware 19808


TRUSTEES OF THE HENRY L. HILLMAN TRUST U/A TRUST
DATED NOVEMBER 18, 1985, ALL OF WHOM ARE U.S. CITIZENS

Henry L. Hillman
2000 Grant Building
Pittsburgh, Pennsylvania 15219

Elsie Hilliard Hillman
2000 Grant Building
Pittsburgh, Pennsylvania 15219

C. G. Grefenstette
2000 Grant Building
Pittsburgh, Pennsylvania 15219

TRUSTEES OF THE 1976 JLHS TRUST DATED 12/30/76, THE 1976 AHF TRUST DATED
12/30/76, THE 1976 HLH TRUST DATED 12/30/76 AND THE 1976 WTH TRUST DATED
12/30/76 ALL OF WHOM ARE U.S. CITIZENS

Thomas G. Bigley
One Oxford Centre
28th Floor
Pittsburgh, Pennsylvania 15219

C. G. Grefenstette
2000 Grant Building
Pittsburgh, Pennsylvania 15219




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