QUICKTURN DESIGN SYSTEMS INC
SC 14D9/A, 1998-10-05
INSTRUMENTS FOR MEAS & TESTING OF ELECTRICITY & ELEC SIGNALS
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                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
 
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                                 SCHEDULE 14D-9
                               (AMENDMENT NO. 12)
 
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               Solicitation/Recommendation Statement Pursuant to
            Section 14(d)(4) of the Securities Exchange Act of 1934
 
                         QUICKTURN DESIGN SYSTEMS, INC.
                           (Name of Subject Company)
 
                         QUICKTURN DESIGN SYSTEMS, INC.
                      (Name of Person(s) Filing Statement)
 
                    COMMON STOCK, PAR VALUE $.001 PER SHARE
           (including the associated preferred stock purchase rights)
                         (Title of Class of Securities)
 
                               ----------------
 
                                   74838E102
                     (CUSIP Number of Class of Securities)
 
                               ----------------
 
                                 KEITH R. LOBO
                     PRESIDENT AND CHIEF EXECUTIVE OFFICER
                         QUICKTURN DESIGN SYSTEMS, INC.
                               55 W. TRIMBLE ROAD
                           SAN JOSE, CALIFORNIA 95131
                                 (408) 914-6000
      (Name, address and telephone number of person authorized to receive
       notice and communications on behalf of person(s) filing statement)
 
                               ----------------
 
                                    COPY TO:
 
                             LARRY W. SONSINI, ESQ.
                        WILSON SONSINI GOODRICH & ROSATI
                            PROFESSIONAL CORPORATION
                               650 PAGE MILL ROAD
                        PALO ALTO, CALIFORNIA 94304-1050
                                 (650) 493-9300
 
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                                 INTRODUCTION
 
  The Solicitation/Recommendation Statement on Schedule 14D-9 (the "Schedule
14D-9") originally filed on August 24, 1998, by Quickturn Design Systems,
Inc., a Delaware corporation (the "Company" or "Quickturn"), relates to an
offer by MGZ Corp., a Delaware corporation ("MGZ") and a wholly owned
subsidiary of Mentor Graphics Corporation, an Oregon corporation ("Mentor"),
to purchase all of the outstanding shares of the common stock, par value $.001
per share (including the associated preferred stock purchase rights), of the
Company. All capitalized terms used herein without definition have the
respective meanings set forth in the Schedule 14D-9.
 
ITEM 8. ADDITIONAL INFORMATION TO BE FURNISHED
 
  The response to Item 8 is hereby amended by adding the following to the end
of the section entitled "Patent Litigation with Mentor":
 
    On October 5, 1998 the Company issued a press release. A copy of such
  press release is attached as Exhibit 39 hereto and is incorporated herein
  by reference.
 
ITEM 9. MATERIAL TO BE FILED AS EXHIBITS
 
  The response to Item 9 is hereby amended by the addition of the following
new exhibits:
 
  Exhibit 39  Press Release of the Company dated October 5, 1998.
 
 
 
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                                   SIGNATURE
 
  After reasonable inquiry and to the best of its knowledge and belief, the
undersigned certifies that the information set forth in this statement is
true, complete and correct.
 
<TABLE>
 <C>                                         <S>
 Dated: October 5, 1998                      QUICKTURN DESIGN SYSTEMS, INC.
</TABLE>
 
                                          By:/s/ Keith R. Lobo
                                             ----------------------------------
                                             Keith R. Lobo
                                             President and Chief Executive
                                              Officer
 
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                                                                    EXHIBIT 39

CONTACTS:
      QUICKTURN DESIGN SYSTEMS, INC.            ABERNATHY MACGREGOR FRANK
      Raymond K. Ostby                          Pauline Yoshihashi/Matt Sherman
      Vice President-Finance & Administration   (213) 630-6550/(212) 371-5999
      (408) 914-6633

FOR IMMEDIATE RELEASE

               QUICKTURN SEEKS $225 MILLION CLAIM FOR DAMAGES
                            FROM MENTOR GRAPHICS

 QUICKTURN WINS FIFTH CONSECUTIVE ROUND IN MENTOR PATENT INFRINGEMENT BATTLE

SAN JOSE, Calif., -- October 5, 1998 -- Quickturn Design Systems, Inc. 
(Nasdaq: QKTN) announced today that it has submitted preliminary damage claims
in excess of $225 million in its U.S. District Court (Oregon) patent 
infringement lawsuit against Mentor Graphics Corporation (Nasdaq: MENT). This 
amount is comprised of at least $75 million of damage claims along with a 
request that the court award an additional $150 million of treble damages on 
the basis that Mentor willfully infringed Quickturn's patents. Willful 
infringement is grounds for a court to award up to treble damages in such 
cases. The trial is scheduled to begin December 1, 1998. The International 
Trade Commission (ITC) has already ruled that Mentor submitted "false and 
misleading" evidence in support of their defenses to the same Quickturn patents
and described Mentor's defenses as "thoughtless, reckless and harassing."

    Keith R. Lobo, Quickturn's president and chief executive officer, said, "We
believe that Mentor understands the full scope of their exposure in this case.
We believe that this exposure is the primary reason that they are trying to 
buy Quickturn with their unsolicited tender offer. If they are successful in 
their takeover bid, they will essentially be paying these damages to 
themselves instead of to Quickturn and its stockholders, to whom that money 
belongs."

    Quickturn also announced today that it won the fifth consecutive round in 
its continuing legal battle to stop Mentor from infringing Quickturn's 
intellectual property. On September 28, 1998, the U.S. Court of Appeals for 
the Federal Circuit denied Mentor's final appeal of the preliminary injunction
granted to Quickturn on August 1, 1997 by Judge Redden of the U.S. District 
Court (Oregon). This ruling reaffirms the Federal Circuit's August 5, 1998 
denial of Mentor's appeal of the Oregon District Court's preliminary 
injunction. Seven days after this denial, Mentor commenced its unsolicited 
takeover bid for Quickturn.

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        Quickturn has been fighting Mentor since late 1995 in two U.S. 
courts and one German court to prevent Mentor from importing, selling, 
distributing or manufacturing certain hardware emulation systems and their 
components which have been found to infringe certain Quickturn patents.

        Quickturn has won every round in these cases during the three years 
since Mentor filed the initial suit attempting to invalidate certain Quickturn 
patents and asking the courts to declare that Mentor's products do not 
infringe those patents. These five rulings in Quickturn's favor have 
consistently upheld the validity of Quickturn's patents and have verified that
Mentor's hardware emulation systems infringe Quickturn's patents. These 
Quickturn wins have included: (1) the August 1996 Temporary Exclusion Order 
issued by the ITC; (2) the August 1997 denial of Mentor's appeal of the ITC's 
Temporary exclusion order; (3) the August 1997 Permanent Exclusion Order 
issued by the ITC which precludes Mentor from importing infringing products 
and components until 2009; (4) the August 1997 Preliminary Injunction issued 
by the U.S. District Court (Oregon) which precludes Mentor from manufacturing 
or selling their infringing products in the United States; and (5) the 
September 1998 denial of Mentor's appeal of the District Court's preliminary 
injunction.

        Quickturn Design Systems, Inc. is the leading provider of verification
products and time-to-market engineering (TtME/TM/) services for the design of 
complex ICs and electronic systems. The company's products are used worldwide 
by developers of high-performance computing, multimedia, graphics and 
communications systems. Quickturn is headquartered at 55 W. Trimble Road, San 
Jose, CA 95131-1013; Telephone: 408/914-6000. For more information, visit the 
Quickturn Web site at www.quickturn.com or send e-mail to [email protected].


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