lzw patent search
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
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.
Welch Patent Licensing Department; Unisys Corporation; Mail Stop E8-114;
Unisys Way, Blue Bell, PA 19424. Via the Internet, send E-mail to
LZW_INFO@UNISYS.COM. Via facsimile, send inquiries to Welch
Patent Licensing Department at 215-986-3090