Quote:
Quoth burnallgifs.org
20 June 2003: The LZW patent expires today in the United States. However, patents on LZW are still in force in other countries. In mail dated Monday, 23 June 2003, Unisys attorney Mark Starr asserts that LZW patents are still in force in Canada, France, Italy, Germany, the United Kingdom, and Japan.
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I do not think it is inherently illegal to use the GIF format, but I do think that its use is to be discouraged.