Acacia Research Corp., a company that buys and licenses patents, said Wednesday that its subsidiary, Video Enhancement Solutions LLC, reached a settlement agreement with Denon Electronics LLC.

The settlement resolves a patent litigation case that was pending in the U.S. District Court for the Central District of California.

Acacia also said its Telematics Corp. subsidiary entered into a patent license agreement with FleetMatics Group Ltd. The pact resolves patent litigation that was pending in the U.S. District Court for the Northern District of Georgia.

Telematics' technology generally relates to systems for displaying mobile vehicle information on a map. This technology can be used in navigation and fleet management systems that combine wireless communication with GPS tracking and map displays.

In related news, Acacia also said its Unified Messaging Solutions, LLC subsidiary has entered into a licensing agreement with Microsoft Corp. covering a range of patents related to web-based e-mail and voice mail messages. Another unnamed unit acquired rights to a patent for radiation therapy technology.