The most recent news that we have on Assertive Licensing and Patent Assertion is in regards to General Patent Corporation's Licensing of their DTL Patent to Plantronics and Sennheiser.

General Patent Corporation (GPC), the leading patent licensing and patent enforcement firm, announced on May 9, 2009 on behalf of its client, Digital Technology Licensing LLC (DTL), that it has licensed DTL's patent to Plantronics, Inc. (NYSE: PLT) and Sennheiser Communications A/S of Denmark.

DTL owns U.S. Patent No. 5,051,799 titled "Digital Output Transducer," which is an essential patent for digital studio microphones. The patented technology also
covers Adaptive Multi-Rate (AMR) codec and other cellular communication standards and is used to assure backward compatibility of cell phone handsets and base stations. Other applications of this patented technology include Bluetooth headsets.

About IP Holdings LLC

IP Holdings LLC, an affiliate of General Patent Corporation, is an IP-centric
merchant banking organization. IP-Holdings provides IP-related financial services as well as IP brokerage services. IP Holdings also operates an idea incubator. IP Holdings is a member of DTL.