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发表于 2009-1-7 11:35:44
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http://en.wikipedia.org/wiki/GIF上的一段话:
The US LZW patent expired on June 20, 2003. The counterpart patents in the United Kingdom, France, Germany and Italy expired on June 18, 2004, the Japanese counterpart patents expired on June 20, 2004 and the counterpart Canadian patent expired on July 7, 2004. |
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