Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839458 | Preparation with controlled amounts of polycarbonate carbon tetrachloride | Shinichiro Koga, Akira Matsuno, Yoshiaki Ohtani, Isao Akihara | 1989-06-13 |
| 4661555 | Polycarbonate resin composition and process for its production | Shinichiro Koga, Katsuhisa Kohyama | 1987-04-28 |
| 4429103 | Method for preparation of aromatic polyester-polycarbonate | Katsuhisa Kohyama, Shinji Ono | 1984-01-31 |
| 4369303 | Process for producing an aromatic polyesterpolycarbonate | Hazime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura, Akira Matsuno | 1983-01-18 |
| 4260731 | Aromatic polyester-polycarbonate | Hajime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura | 1981-04-07 |
| 4252939 | Method for manufacture of aromatic polyester-polycarbonate | Hajime Mori, Katsuhisa Kohyama, Katsuhiko Nakamura | 1981-02-24 |
| 4239882 | Process for producing polyester | Tsuneo Kimura, Katsuhisa Kohyama, Takehiro Okada | 1980-12-16 |