Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4741989 | Positive photoresist aqueous developer solution containing quaternary ammonium hydroxide with aliphatic ketone or cyclic ether alone or with amine as development modifier | Kenji Niwa | 1988-05-03 |
| 4673554 | Method of purifying tantalum | Kenji Niwa | 1987-06-16 |
| 4220738 | Process for producing block copolymer from conjugated diene and vinyl aromatic | Tamotsu Miki, Shizuo Narisawa, Hideki Horiike | 1980-09-02 |