EX-23.1 2 0002.txt CONSENT OF INDEPENDENT ACCOUNTANTS CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in this Amendment No. 1 to the Registration Statement on Form S-3 (No. 333-43222) of our report dated February 25, 2000, except for note 10, as to which the date is March 20, 2000 relating to the financial statements and financial statement schedules, which appears in Acacia Research Corporation's Annual Report on Form 10-K for the year ended December 31, 1999. We also consent to the reference to us under the heading "Experts" in such Registration Statement. /s/ PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Los Angeles, California August 14, 2000