Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D307893 | Magnetic recording disk cartridge | Vurnen J. Leonard, Osamu Sakurai, Osamu Koizumi | 1990-05-15 |
| 4875128 | Disc cartridge | Vurnen J. Leonard, Kiyoshi Ohmori, Keisuke Fujiwara, Yutaka Soda | 1989-10-17 |