Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890310 | Spectral type radiation imaging system | Keiji Umetani, Ryuichi Suzuki, Hisatake Yokouchi | 1989-12-26 |
| 4835308 | Process for producing trimellitic acid | Yasuzo Sakakibara, Kouji Tomita | 1989-05-30 |