Microsoft FAT file system patent upheld
The US Patent and Trademark Office has upheld
Microsoft's FAT file system patent. The patent had been challenged and reexamined by the patent office, but it appears that Microsoft has been vindicated.
Microsoft has now prevailed and the USPTO is in the process of issuing a "patent re-examination certificate." The company could theoretically seek royalties from companies utilize FAT, including Linux vendors and memory stick manufacturers. Lexar has already licensed the technology from Microsoft.
More information on Microsoft's FAT file system technology license is available here