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PKZIP
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==Patents== Shrinking uses dynamic [[Lempel–Ziv–Welch|LZW]], on which [[Unisys]] held patents. A patent for the Reduce Algorithm had also been filed on June 19, 1984, long before PKZIP was produced.<ref>{{cite web|url=http://www.faqs.org/faqs/compression-faq/part1/section-7.html|title=comp.compression Frequently Asked Questions (part 1/3)Section - [8] What about patents on data compression algorithms?|work=faqs.org|access-date=October 4, 2007|archive-date=May 13, 2008|archive-url=https://web.archive.org/web/20080513135306/http://www.faqs.org/faqs/compression-faq/part1/section-7.html|url-status=live}}</ref>
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