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.
History of science and technology in Japan
In 1984, Sony introduced a LaserDisc format that could store any form of digital data, as a data storage device similar to CD-ROM, with a larger capacity of 3.28 GiB. The DVD format was developed by Sony, Panasonic and Toshiba in 1994. The same year, Sony and Tatung Company released the first DVD player.Flash memory (both NOR and NAND types) was invented by Dr. Fujio Masuoka while working for Toshiba around 1980.Dr. Norikazu Sawazaki invented a prototype video tape recorder in 1953, based on helical scan technology.In Japan, the computer was using digital video disks to display color pictures at 256x256 image resolution in 1972.