Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5153288 | Cladding material for optical fiber and method for its manufacture | Tadayo Matsunaga, Heiroku Suganuma, Genzaburo Nakamura | 1992-10-06 |
| 4812032 | Highly-refractive plastic lens | Sadayuki Sakamoto, Masami Saito | 1989-03-14 |
| 4721377 | Highly-refractive plastic lens | Sadayuki Sakamoto, Masami Saito | 1988-01-26 |
| 4487904 | Urethanized acrylic resin material for plastic lens and lens composed thereof | Sadayuki Sakamoto | 1984-12-11 |
| 4443588 | Highly refractive urethane polymers for use in optical lenses and lenses prepared therefrom | Tadayo Matsunaga | 1984-04-17 |
| 4410597 | Polyurethane resins and polyurethane resin coating compositions | Masaki Nishino, Yutaka Yasuhara, Sadayuki Sakamoto | 1983-10-18 |
| 4247675 | Polyurethane resins and polyurethane resin coating compositions | Sadayuki Sakamoto, Masami Saito | 1981-01-27 |