[ Thanks to McWell for this link.
“The U.S. Patent Office has rejected two Microsoft patents over
the FAT file format, but the software maker said Wednesday that
it’s not ready to give up its battle to protect its widely used
method for storing data.
“The patent office delivered its ruling late last month but made
it public this week. With one of the patents, the decision is
what’s considered a final rejection, while with another it’s
considered nonfinal. In both cases, Microsoft has the ability to
pursue its claims further…”