3 1 a2096552z3.htm FORM 3
SEC 1473
(09-02)		   POTENTIAL PERSONS WHO ARE TO RESPOND TO THE COLLECTION OF INFORMATION CONTAINED IN THIS FORM ARE NOT REQUIRED TO RESPOND UNLESS THE FORM DISPLAYS A CURRENTLY VALID OMB CONTROL NUMBER.
        FORM 3



(Print or Type Responses)		   UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF
BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934,
Section 17(a) of the Public Utility Holding Company Act of 1935 or
Section 30(h) of the Investment Company Act of 1940		  
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1.   Name and Address of Reporting Person*   2.   Date of Event Requiring Statement
(Month/Day/Year)		   4.   Issuer Name and Ticker or Trading Symbol
    Nanogen, Inc., a Delaware corporation   December 16, 2002   Acacia Research Corporation (CBMX which represents a tracking stock of Acacia)
 
 
    (Last)   (First)   (Middle)   3.   I.R.S. Identification Number of Reporting Person, if an entity (voluntary)   5.   Relationship of Reporting Person(s) to Issuer (Check all applicable)   6.   If Amendment, Date of Original
(Month/Day/Year)
                                 Director            10% Owner        
10398 Pacific Center Court
(Street)		   33-0489621
                  Officer
              (give title below)		     X   Other
              (specify below)		  
                                    7.   Individual or Joint/Group Filing
    San Diego   California   92121           17.5% owner of AR CombiMatrix Stock, a class of Acacia tracking stock.
Note: This is not Acacia's only equity security and filer believes when combined with Issuer's other equity securities, it owns less than 10% of Acacia		        
         
      (Check Applicable Line)
    (City)   (State)   (Zip)                               X     Form filed by One Reporting Person
               Form filed by More than One Reporting Person

Table I — Non-Derivative Securities Beneficially Owned

1.   Title of Security
(Instr. 4)		   2.   Amount of Securities
Beneficially Owned
(Instr. 4)		   3.   Ownership Form:
Direct (D) or Indirect (I)
(Instr. 5)		   4.   Nature of Indirect
Beneficial Ownership
(Instr. 5)
    AR CombMatrix Stock       4,016,346       D        
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
                             
FORM 3 (Continued)   Table II — Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
    
1.   Title of Derivative Security
(Instr. 4)		   2.   Date Exercisable and Expiration Date
(Month/Day/Year)		   3.   Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		   4.   Conversion or Exercise Price of Derivative Security   5.   Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		   6.   Nature of Indirect Beneficial Ownership
(Instr. 5)
                                 
       
                       
            Date
Exercisable		   Expiration
Date		       Title   Amount or Number of Shares                        
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     
                                                     

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

Explanation of Responses:

/s/ RANDY J. BERHOLTZ   12/17/02
**Signature of Reporting Person		  
Date
Senior Corporate Counsel and Senior
Director, Business Development
 		   

  *If the form is filed by more than one reporting person, see Instruction 5(b)(v)

**Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.