Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887957 | Nozzle for melt spinning of pitch and method for spinning pitch | Masakatsu Ohta | 1989-12-19 |
| 4816202 | Method of melt spinning pitch | — | 1989-03-28 |
| 4608150 | Pitch material for carbonaceous body and a method for the preparation thereof | Masakatsu Ohta, Taizo Sugioka, Kunio Yoshihara, Hiroshi Nishitani | 1986-08-26 |
| 4452966 | Process for the production of polycarbonate | Shigeru Matsuo | 1984-06-05 |