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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No. 2)*
I-STAT
- --------------------------------------------------------------------------------
(Name of Issuer)
Common Stock
- --------------------------------------------------------------------------------
(Title of Class of Securities)
450312103
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(CUSIP Number)
*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.
The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).
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<CAPTION>
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CUSIP No. 450312103 13G Page 2 of 9 Pages
- --------------------------------------- --------------------------------------
- --------- -------------------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Mutual Life Insurance Company
I.R.S. No. 04-1414660
- --------- -------------------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_|
(b) |_|
N/A
- --------- -------------------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
- --------- -------------------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Commonwealth of Massachusetts
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-------- -----------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
-------- -----------------------------------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
-------- -----------------------------------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
-------- -----------------------------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
-------- -----------------------------------------------------------------------------------------------
- --------- -------------------------------------------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None, except through its indirect, wholly-owned subsidiary, John
Hancock Advisers, Inc.
- --------- -------------------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------- -------------------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
- --------- -------------------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
IC, IA, HC
- --------- -------------------------------------------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 2 OF 9 PAGES
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CUSIP No. 450312103 13G Page 3 of 9 Pages
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1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Subsidiaries, Inc.
I.R.S. No. 04-2687223
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2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_|
(b) |_|
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
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4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
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--------- ---------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
--------- ---------------------------------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
--------- ---------------------------------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
--------- ---------------------------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
--------- ---------------------------------------------------------------------------------------------
- --------- ---------------------------------------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None, except through its indirect, wholly-owned subsidiary, John
Hancock Advisers, Inc.
- --------- ---------------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
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12 TYPE OF REPORTING PERSON*
HC
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*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 3 OF 9 PAGES
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<S> <C>
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CUSIP No. 450312103 13G Page 4 of 9 Pages
- --------------------------------------- --------------------------------------
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1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
The Berkeley Financial Group
I.R.S. No. 04-3145626
- --------- ---------------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_|
(b) |_|
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
- --------- ---------------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Commonwealth of Massachusetts
- --------- ---------------------------------------------------------------------------------------------------------------
-------- ---------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares -0-
-------- ---------------------------------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each -0-
-------- ---------------------------------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With -0-
-------- ---------------------------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
-------- ---------------------------------------------------------------------------------------------
- --------- ---------------------------------------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
None, except through its indirect, wholly-owned subsidiary, John
Hancock Advisers, Inc.
- --------- ---------------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
See line 9, above.
- --------- ---------------------------------------------------------------------------------------------------------------
12 TYPE OF REPORTING PERSON*
HC
- --------- ---------------------------------------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 4 OF 9 PAGES
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<S> <C>
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CUSIP No. 450312103 13G Page 5 of 9 Pages
- --------------------------------------- --------------------------------------
- --------- ---------------------------------------------------------------------------------------------------------------
1 NAME OF REPORTING PERSON
S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
John Hancock Advisers, Inc.
I.R.S. No. 04-2441573
- --------- ---------------------------------------------------------------------------------------------------------------
2 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP* (a) |_|
(b) |_|
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
3 SEC USE ONLY
- --------- ---------------------------------------------------------------------------------------------------------------
4 CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------- ---------------------------------------------------------------------------------------------------------------
-------- ---------------------------------------------------------------------------------------------
5 SOLE VOTING POWER
Number of
Shares 570,000
-------- ---------------------------------------------------------------------------------------------
Beneficially 6 SHARED VOTING POWER
Owned by
Each
-0-
-------- ---------------------------------------------------------------------------------------------
Reporting 7 SOLE DISPOSITIVE POWER
Person
With 570,000
-------- ---------------------------------------------------------------------------------------------
8 SHARED DISPOSITIVE POWER
-0-
-------- ---------------------------------------------------------------------------------------------
- --------- ---------------------------------------------------------------------------------------------------------------
9 AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
570,000
- --------- ---------------------------------------------------------------------------------------------------------------
10 CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
N/A
- --------- ---------------------------------------------------------------------------------------------------------------
11 PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
4.3%
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12 TYPE OF REPORTING PERSON*
IA
- --------- ---------------------------------------------------------------------------------------------------------------
*SEE INSTRUCTIONS BEFORE FILLING OUT!
PAGE 5 OF 9 PAGES
</TABLE>
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The original statement shall be signed by each person on whose behalf
the statement is filed or his authorized representative. If the statement is
signed on behalf of a person by his authorized representative other than an
executive officer or general partner of the filing person, evidence of the
representative's authority to sign on behalf of such person shall be filed with
the statement, provided, however, that a power of attorney for this purpose
which is already on file with the Commission may be incorporated by reference.
The name and any title of each person who signs the statement shall be typed or
printed beneath his signature.
Note: Six copies of this statement, including all exhibits, should be filed with
the Commission.
Attention: Intentional misstatements or omissions of fact constitute
Federal criminal violations (See 18 U.S.C. 1001)
Item 1(a) Name of Issuer:
I-STAT
Item 1(b) Address of Issuer's Principal Executive Offices:
303A College Road East
Princeton, NJ 08540
Item 2(a) Name of Person Filing:
This filing is made on behalf of John Hancock Mutual Life
Insurance Company ("JHMLICO"), JHMLICO's direct,
wholly-owned subsidiary, John Hancock Subsidiaries, Inc.
("JHSI"), JHSI's direct, wholly-owned subsidiary, The
Berkeley Financial Group ("TBFG") and TBFG's wholly-owned
subsidiary, John Hancock Advisers, Inc. ("JHA").
Item 2(b) Address of the Principal Offices:
The principal business offices of JHMLICO and JHSI are
located at John Hancock Place, P.O. Box 111, Boston, MA
02117. The principal business offices of TBFG and JHA are
located at 101 Huntington Avenue, Boston, Massachusetts
02199.
Item 2(c) Citizenship:
JHMLICO and TBFG were organized and exist under the laws
of the Commonwealth of Massachusetts. JHSI and JHA were
organized and exist under the laws of the State of
Delaware.
Item 2(d) Title of Class of Securities:
Common Stock
Item 2(e) CUSIP Number:
450312103
Item 3 If the Statement is being filed pursuant to Rule 13d-1(b),
or 13d-2(b), check whether the person filing is a:
JHMLICO: (c) (X) Insurance Company as defined in ss.3(a)
(19) of the Act.
(e) (X) Investment Adviser registered
under ss.203 of the Investment
Advisers Act of 1940.
(g) (X) Parent Holding Company, in
accordance with ss.240.13d-1(b)(ii)(G).
PAGE 6 OF 9 PAGES
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JHSI: (g) (X) Parent Holding Company, in accordance
with ss.240.13d-1(b)(ii)(G).
TBFG: (g) (X) Parent Holding Company, in accordance
with ss.240.13d-1(b)(ii)(G).
JHA: (e) (X) Investment Adviser registered under
ss.203 of the Investment Advisers Act
of 1940.
Item 4 Ownership:
(a) Amount Beneficially Owned: JHA has direct
beneficial ownership of 570,000 shares of Common
Stock. Through their parent-subsidiary relationship
to JHA, JHMLICO, JHSI and TBFG have indirect,
beneficial ownership of these same shares.
(b) Percent of Class: 4.3%
(c) (i) sole power to vote or to direct the vote: JHA has
sole power to vote or direct the direct the vote
of the 570,000 shares of Common Stock under the
Advisory Agreement as follows:
Date of
Number Advisory
Fund Name of Shares Agreement
--------- ---------- ---------
John Hancock Special
Equities Fund 570,000 January 1, 1994
(ii) shared power to vote or to direct the vote: -0-
(iii) sole power to dispose or to direct the
disposition of: JHA has sole power to
dispose or to direct the disposition of the
570,000 shares of Common Stock under the
Advisory Agreement noted in Item 4(c)(i)
above.
(iv) shared power to dispose or to direct the
disposition of: -0-
Item 5 Ownership of Five Percent or Less of a Class:
With this filing, the Reporting Persons state that they
own five percent or less of Common Stock.
Item 6 Ownership of More than Five Percent on Behalf of Another
Person: See Item 4.
Item 7 Identification and Classification of the Subsidiary
which Acquired the Security Being Reported on by the
Parent Holding Company:
See Items 3 and 4 above.
Item 8 Identification and Classification of Members of the Group:
Not applicable.
Item 9 Notice of Dissolution of a Group:
Not applicable.
Item 10 Certification:
By signing below the undersigned certifies that, to the
best of its knowledge and belief, the securities referred
to above were acquired in the ordinary course of business
and were not acquired for the purpose of and do not have
the effect of changing or influencing the control of the
issuer of such securities and were not acquired in
connection with or as a participant in any transaction
having such purpose or effect.
PAGE 7 OF 9 PAGES
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SIGNATURE
After reasonable inquiry and to the best of its knowledge and belief,
each of the undersigned certifies that the information set forth in this
statement is true, complete and correct.
John Hancock Mutual Life Insurance Company
By: /s/John T. Farady
-----------------------------------
Name: John T. Farady
Dated: January 21, 1998 Title: Senior Vice President & Treasurer
John Hancock Subsidiaries, Inc.
By: /s/John T. Farady
-----------------------------------
Name: John T. Farady
Dated: January 21, 1998 Title: Treasurer
The Berkeley Financial Group
By: /s/Susan S. Newton
-----------------------------------
Name: Susan S. Newton
Dated: January 21, 1998 Title: Vice President
John Hancock Advisers, Inc.
By: /s/Susan S. Newton
-----------------------------------
Name: Susan S. Newton
Dated: January 21, 1998 Title: Vice President
PAGE 8 OF 9 PAGES
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EXHIBIT A
JOINT FILING AGREEMENT
John Hancock Mutual Life Insurance Company, John Hancock Subsidiaries,
Inc., The Berkeley Financial Group and John Hancock Advisers, Inc. agree that
the terminating Schedule 13G (Amendment No. 2), to which this Agreement is
attached, relating to the Common Stock of I-STAT is filed on behalf of each of
them.
John Hancock Mutual Life Insurance Company
By: /s/John T. Farady
-----------------------------------
Name: John T. Farady
Dated: January 21, 1998 Title: Senior Vice President & Treasurer
John Hancock Subsidiaries, Inc.
By: /s/John T. Farady
-----------------------------------
Name: John T. Farady
Dated: January 21, 1998 Title: Treasurer
The Berkeley Financial Group
By: /s/Susan S. Newton
-----------------------------------
Name: Susan S. Newton
Dated: January 21, 1998 Title: Vice President
John Hancock Advisers, Inc.
By: /s/Susan S. Newton
-----------------------------------
Name: Susan S. Newton
Dated: January 21, 1998 Title: Vice President
PAGE 9 OF 9 PAGES
