Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5344682 | Optical recording medium | Tadahiko Mizukuki, Tadashi Koike, Sumio Hirose | 1994-09-06 |
| 5283094 | Optical recording medium | Tomoyoshi Sasakawa, Tadashi Koike, Hiroyuki Hyakutake | 1994-02-01 |