EXHIBIT 23.2

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (Nos. 333-122452, 333-133529) and in the Registration Statements on Form S-8 (Nos. 333-102181, 333-109352, 333-119811, 333-127583, 333-131463, 333-140280, 333-144754, 333-149849, 333-22197, 333-42024, 333-62389) of Acacia Research Corporation of our report dated March 12, 2007, except for Note 10A, as to which the date is March 10, 2008, relating to the consolidated financial statements, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

Orange County, California

February 26, 2009

III-12