en.swpat.org is a wiki.   You can edit it.   May contain statements End Software Patents does not endorse.

October 2014: US Supreme Court reining in software patents (Alice v. CLS)!

SitemapCountriesWhy abolish?Law proposalsStudiesCase lawPatent office case lawLawsuits


GIF

From en.swpat.org
Jump to: navigation, search

The GIF image format is widely used on the World Wide Web. To make a GIF image, the LZW algorithm is required. Until 2004, this algorithm had problems with patents that were aggressively enforced.

After this format became widely used, a company called Unisys began threatening developers and distributors with patent infringement based on a 1983 patent, US-4,464,650. (patent ambush)

As of 2004, that patent is expired and GIF is generally considered to be free of patent problems.

[edit] Related pages on en.swpat.org

[edit] External links


This wiki is part of the End Software Patents (ESP) campaign (donate). For more information, see:
>> endsoftwarepatents.org (Main ESP website) <<
>> endsoftwarepatents.org/news (News) <<

This wiki is publicly editable. (See: en.swpat.org:About) It's a pool of information, not a statement of ESP's views or policies, so no permission is required. Add your knowledge! (See: Help:How to make a good contribution)