In connection with the Quarterly Report of Acacia
Research Corporation (the “Company”) on Form 10-Q for the quarterly period ended
September 30, 2009, as filed with the Securities and Exchange Commission on
November 4, 2009 (the “Report”), I, Paul R.
Ryan, Chairman and Chief Executive Officer of the Company, hereby certify,
pursuant to Rule 13a-14(b) or Rule 15d-14(b) of the Securities Exchange Act of
1934 and 18 U.S.C. Section 1350, that:
Report fully complies with the requirements of Section 13(a) or 15(d) of the
Securities Exchange Act of 1934 (15 U.S.C. 78m(a) or 780(d)); and
information contained in the Report fairly presents, in all material respects,
the financial condition and results of operations of the Company.
By: /s/ Paul R.
and Chief Executive Officer
certification accompanies the Report pursuant to Rule 13a-14(b) or Rule
15d-14(b) under the Securities Exchange Act of 1934 and 18 U.S.C. Section 1350
and shall not be deemed filed by the Company for purposes of Section 18 of the
Securities Exchange Act of 1934.