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Microsoft FAT patents

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Microsoft has a number of patents on how to deal with filename in their commonly used FAT filesystem. These patents have been issued in the USA, Germany, and surely a long list of other countries.

The FAT patents have the interesting property of being useful only for compatibility with the patent owner. The FAT patents are not otherwise useful; in fact the FAT filesystem is technically undesirable. Those who wish to make use of the patent are clearly seeking compatibility, not innovation or other useful properties.


[edit] In the USA

In December 2003, Microsoft announced[1] licensing demands of four patents for the FAT filesystem:

[edit] Timeline

[edit] In Europe

The patents granted by the European Patent Office are:

[edit] Upheld in Germany

(See: X ZR 27/07 (2010, April, Germany))

[edit] Related pages on en.swpat.org

[edit] External links

[edit] References

  1. http://web.archive.org/web/20041229090400/http://www.microsoft.com/mscorp/ip/tech/fat.asp
  2. http://www.pubpat.org/Microsoft_517_Reexam_Filed.htm
  3. http://www.smh.com.au/articles/2003/12/05/1070351761346.html
  4. http://www.pubpat.org/assets/files/MicrosoftFAT/Reynolds_517_Rejected_040916.PDF
  5. http://www.pubpat.org/Microsoft_517_Rejected.htm
  6. http://news.cnet.com/Microsofts-file-system-patent-upheld/2100-1012_3-6025447.html
  7. http://www.fosspatents.com/2012/07/with-german-fat-patent-ruling-microsoft.html

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