Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4795840 | Method for preparing hydrocarbon mixture solvent | Seiji Hirooka | 1989-01-03 |
| 4767819 | Ultra-high-molecular-weight polyethylene solution | Shigeki Yokoyama, Kazuo Matsuura, Akira Sano | 1988-08-30 |
| 4507516 | Fuel composition | Seiji Hirooka | 1985-03-26 |