Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5861537 | Method of producing high-quality polyethylenepolyamines | Sadakatsu Kumoi | 1999-01-19 |
| 4689269 | Magnetic recording medium comprising a specific type of copolymer binder | Yasuo Mukai, Yosuke Takasawa, Masanobu Shimizu | 1987-08-25 |