Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5300314 | Process for preparing a magnetic recording medium | Satoru Hayakawa, Toshio Kawamata | 1994-04-05 |
| 5179487 | Magnetic recording disk loaded in a cartridge with a specified liner | Satoru Hayakawa | 1993-01-12 |