Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5156860 | Apparatus for manufacturing an optical disk substrate by injection molding | Kotaro Kojima, Yasumasa Shibata | 1992-10-20 |
| 5059461 | Optical disk substrate, optical information-storage medium, and process and apparatus for manufacturing the optical disk substrate | Kotaro Kojima, Yasumasa Shibata | 1991-10-22 |