DOLBY SKATES ON SUMMARY JUDGMENT AGAINST LUCENT: Dolby Laboratories, Inc. announced that on April 22, 2005, the US District Court for the Northern District of California granted Dolby's motions for summary judgment that Dolby has not infringed, induced others to infringe, or contributed to the infringement of United States Patent No. 5,341,457 (the "'457 patent") or United States Patent No. 5,627,938 (the "'938 patent").

The '457 patent and the '938 patent generally involve a process and means for digitally encoding and decoding audio signals. Dolby filed these motions as part of an ongoing dispute with Lucent Technologies, Inc., and Lucent Technologies Guardian I, LLC (together "Lucent"), in which Dolby contended that Lucent was wrongly asserting that Dolby licensees using Dolby(R) AC-3 audio compression technology (also known as Dolby Digital) required licenses to the '457 and '938 patents.

In granting summary judgment of noninfringement, the court found that Lucent had not presented evidence from which a reasonable fact finder could find that Dolby(R) AC-3 technology infringes either the '457 or '938 patents. The court's April 22, 2005, ruling resolves these issues in favor of Dolby.