Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696892 | Optical information recording medium | Michiharu Abe, Masaakira Umehara, Tsutomu Sato, Hideaki Oba, Yutaka Ueda | 1987-09-29 |
| 4477555 | Optical information recording medium | Hideaki Oba, Masaakira Umehara, Kiyoshi Tanikawa, Michiharu Abe | 1984-10-16 |
| 4460665 | Optical information recording medium | Michiharu Abe, Masaakira Umehara | 1984-07-17 |
| 4332884 | Photo-sensitive and heat-sensitive composition and recording element using same | Koji Uji-Ie, Masaakira Umehara, Kiyoshi Taniguchi | 1982-06-01 |
| 4315068 | Photo-sensitive and heat-sensitive composition and recording element using same | Masaakira Umehara, Koji Uji-Ie, Kiyoshi Taniguchi | 1982-02-09 |
| 4306014 | Photo-sensitive and heat-sensitive composition and recording element using same | Akiyoshi Yasumori, Kiyoshi Taniguchi, Tetu Yamamuro | 1981-12-15 |