Are there any issues with Microsofts copyrights to the FAT16 and FAT32 file systems?
When pubpat.org had managed to get Microsofts FAT patent overturned in Q3 2004, I thought it was safe to design this library. However, in January of 2006, the patent office again reversed its decision and gave Microsoft its patents. But from what I understand, these patents cover only FAT32 and VFAT (which is long filenames.) So if you stick to using FAT16, you should be clear of any patent problems.