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Looks like the LZW patent doesn't expire until June 2003. Updated the
comment to reflect this.
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* and Andy Nicholas.
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* and Andy Nicholas.
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*
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*
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* Unisys holds US patent #4,558,302 (filed June 20, 1983 and issued December
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* Unisys holds US patent #4,558,302 (filed June 20, 1983 and issued December
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* 10, 1985). Patents are good for 17 years from date of issue, so the
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* 10, 1985). A policy set in 1995 specifies the lifetime of a patent as
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* patent remains in effect until the end of 2002.
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* the longer of 20 years from the date of application or 17 years from the
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* date of grant, so the Unisys LZW patent will expire on June 20, 2003.
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*
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*
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* The Unisys patent is one of many that covers LZW compression, but Unisys
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* The Unisys patent is one of many that covers LZW compression, but Unisys
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* is the only company actively attacking anyone who uses it. The statement
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* is the only company actively attacking anyone who uses it. The statement
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