Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5097298 | Blue light emitting display element | — | 1992-03-17 |
| 4943503 | Amorphous silicon photoreceptor | Hideo Nojima, Yoshimi Kojima, Eiji Imada, Toshiro Matsuyama, Takashi Hayakawa +1 more | 1990-07-24 |
| 4907051 | Photocathode | — | 1990-03-06 |
| 4853309 | Photoreceptor for electrophotography with a-Si layers having a gradient concentration of doped atoms and sandwiching the photoconductive layer therebetween | Takashi Hayakawa, Hideo Nojima, Yoshimi Kojima, Shiro Narikawa, Toshiro Matsuyama +1 more | 1989-08-01 |
| 4851256 | Apparatus and method for manufacturing photosensitive amorphous silicon objects | Toshiro Matsuyama, Yoshimi Kojima | 1989-07-25 |
| 4687724 | Photoreceptor for electrophotography comprising boron doped a-Si.sub.1-x N.sub.x :H:F | Yoshimi Kojima, Eiji Imada, Takashi Hayakawa, Toshiro Matsuyama | 1987-08-18 |
| 4666816 | Method of manufacturing an amorphous Si electrophotographic photoreceptor | Yoshimi Kojima, Shiro Narikawa, Takashi Hayakawa, Hideo Nojima, Eiji Imada +1 more | 1987-05-19 |
| 4615299 | Plasma CVD apparatus for making photoreceptor drum | Toshiro Matsuyama, Takashi Hayakawa, Yoshimi Kojima, Shiro Narikawa | 1986-10-07 |