Patents
In the first San Diego case, Alcatel-Lucent claims ownership of several patents relating to MP3 and MPEG encoding and compression technologies, as well as other technologies. The patents were obtained as the result of work done at Bell Labs before the breakup of American Telephone & Telegraph. Certain patents at issue were:
U.S. Patent No. 5,341,457, Perceptual Coding of Audio Signals, to Joseph L. Hall and James D. Johnston. Filed: August 20, 1993 Granted: August 23, 1994
U.S. Reissue Patent No. RE39,080, Rate loop processor for perceptual encoder/decoder, to James D. Johnston. Filed: August 13, 2002. Reissue of 05627938 Filed: Sep., 1994 Granted: May., 1997
Read more about this topic: Alcatel-Lucent V. Microsoft