A Michigan-based networking company on Wednesday filed a lawsuit against Google, Microsoft, and Apple, alleging that all three tech giants violated a patent it owns on the use of document-preview icons--or thumbnails--in operating systems.
In the suit (PDF), Cygnus Systems targets Google's Chrome, Microsoft's Vista and Internet Explorer 8, and Apple's iPhone, Safari, and Mac OS X as patent infringers. Apple uses the patent-protected technology in its Finder and Cover Flow Mac OS X features, the lawsuit claims.
Cygnus describes the technology covered by the patent as "methods and systems for accessing one or more computer files via a graphical icon, wherein the graphical icon includes an image of a selected portion or portions of one or more computer files."
E-mails seeking comment from Google, Microsoft, Apple, and Cygnus' attorney were not immediately returned.
The case was filed in U.S. District Court in Arizona, where company owner Gregory Swartz lives, according to PCWorld.
Cygnus was granted the patent in March 2008, according to the lawsuit, although it first applied for it back in 2001 as a continuation to a 1998 application, according to Ars Technica, which appeared to report the case first.
Cygnus is seeking damages and a permanent injunction to prevent further alleged infringement. It has also indicated that it might go after other companies as defendants.
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