Issued Patents All Time
Showing 176–178 of 178 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4307319 | Semiconductor layer of oxygen depletion type cerium oxide or lead oxide | Tadaaki Hirai, Eiichi Maruyama, Hideaki Yamamoto, Tsutomu Fujita, Naohiro Goto +1 more | 1981-12-22 |
| 4296419 | Member for recording information | Kazuo Shigematsu, Masahiro Ojima, Seiji Yonezawa | 1981-10-20 |
| 4238803 | Information recording methods using lasers | Seiji Yonezawa | 1980-12-09 |