Yoshiro Nakamatsu
Nakamatsu claims IBM reached licensing agreements with him in the late 1970s. He also claims to have licensed his floppy disk to IBM in 1979, but that the details are "confidential". An IBM spokesman, Mac Jeffery, confirmed that the company did license some of his patents, but claimed they were not for the floppy disk, which he claimed IBM invented on its own. Another IBM spokesman, Brian Doyle, said they licensed 14 patents from Nakamatsu, but also claimed that they do not have anything to do with the floppy disk.
Didaktik
5.25-inch floppy disk drive called D40 was introduced in 1992 and featured a "Snapshot" (see also Hibernation (computing)) button that allowed to store current content of the memory (memory image) on diskette. It was also possible later to load the memory image and continue playing the game (or whatever was stored) from the respective state.