Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5427893 | Optical data recording medium | Eiji Koyama, Akira Gotoh, Ryoichi Sudo, Hiroaki Miwa | 1995-06-27 |
| 5273860 | Information recording medium | Tetsuya Nishida, Shinkichi Horigome, Mari Ichikawa, Norio Ohta, Akira Gotoh | 1993-12-28 |
| 5234792 | Optical data recording medium and manufacturing method thereof | Eiji Koyama, Akira Gotoh, Ryoichi Sudo, Hiroaki Miwa | 1993-08-10 |
| 5132152 | Optical recording medium and method for manufacturing the same | Akira Gotoh, Eiji Koyama | 1992-07-21 |
| 5126180 | Optical recording medium and method of manufacturing the same | Akira Gotoh, Shinkichi Horigome, Tetsuya Nishida | 1992-06-30 |