Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5693348 | Disc molding die | Yasuyoshi Sakamoto, Akira Hatano | 1997-12-02 |
| 5501592 | Mold having opposed offset cooling channels | — | 1996-03-26 |
| 5417899 | Injection compression molding method for compact discs or the like | — | 1995-05-23 |
| 5354517 | Process for the preparation of substrates for optical disk | Kazuyuki Yamasaki | 1994-10-11 |
| 5098281 | Injection mold capable of shearing film gate within mold | — | 1992-03-24 |
| 5018962 | Injection molding die apparatus for use in the production of substrate of optical disk | Hirosato Amano, Masaharu Kaita | 1991-05-28 |
| 4979891 | Mold for molding optical disk base | — | 1990-12-25 |
| 4327226 | Process and apparatus for producing aromatic dicarboxylic acids | Motoo Shigeyasu | 1982-04-27 |
| 4189603 | Process for producing high-quality terephthalic acid suitable for use in direct polymerization | Motoo Shigeyasu, Hatsutaro Yamazaki | 1980-02-19 |