Hi, When do all the lzw related patents expire? I've heard different stories and am confused by all the different patents that seem to exist for lzw. I also am unsure as to how to search for information about each of the lzw patents.
http://www.google.ca/search?q=cache:gHNrsOfbP7UC:www.unisys.com/about__unisys/lzw/+lzw&hl=en&ie=UTF-8 says: including United States Patent No. 4,558,302, Japanese Patent Numbers 2,123,602 and 2,610,084, and patents in Canada, France, Germany, Italy and the United Kingdom. and: Welch Patent Licensing Department; Unisys Corporation; Mail Stop E8-114; Unisys Way, Blue Bell, PA 19424. Via the Internet, send E-mail to [EMAIL PROTECTED] Via facsimile, send inquiries to Welch Patent Licensing Department at 215-986-3090 Thanks Drew Daniels
