Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5552098 | Method for fabrication of disc substrate | Jun Shimizu | 1996-09-03 |
| 5427520 | Mold device for fabricating disc substrate | Jun Shimizu | 1995-06-27 |
| 5326240 | Metal mold device for molding a disc substrate | Jun Shimizu | 1994-07-05 |
| 4879082 | Method for molding plastic material into disk shaped sabstrate for an optical information record carrier | Yoshihiro Shimizu | 1989-11-07 |
| 4798767 | Optical information record medium | Tokuei Aoki, Katsumi Kohno | 1989-01-17 |