Cytat
20 June 2003: The LZW patent expires today in the United States. However, patents on LZW are still in force in other countries.
Cytat
The Unisys LZW patent expires in the USA on June 20, 2003. However, according to Unisys, they hold LZW patents outside the USA that expire in 2004.
http://burnallgifs.org/ = google search -> "unisys gif patent" wynik nr 1