Acacia Research Corporation was legally established in California on January 25, 1993. In December 1999, the company was re-registered in Delaware. Acacia's subsidiaries are dedicated to the acquisition, development and licensing of patented technologies. The revenue and related cash flow of Acacia subsidiaries are mainly generated from the right to use intellectual property and patented technology held by the company. Acacia's subsidiaries assist patent owners in the prosecution and development of their patent portfolios, protect unauthorized use of patented technology, generate revenue from users of patented technology, and oppose unauthorized users when necessary. Currently, Acacia's subsidiaries own or control multiple patent portfolios, including US patents and certain foreign patents, with patented technologies covering various industries.