Widevine Expands Patent Suit Against Verimatrix

Law360 (May 20, 2008, 12:00 AM EDT) -- Widevine Technologies Inc. has stepped up its legal battle against Verimatrix Inc., filing an amended complaint that adds another patent to its infringement suit over video encryption technology.

The amended complaint, filed Tuesday in the U.S. District Court for the Eastern District of Texas, takes aim at Verimatrix's video content authority system, claiming the VCAS product infringes on Widevine's U.S. Patent Number 7,376,831, which covers Widevine's Cypher technology for video encryption.

Widevine first launched its suit against Verimatrix last August over Verimatrix's alleged infringement of U.S....
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