Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5425041 | Multiquantum barrier laser having high electron and hole reflectivity of layers | Yasuji Seko, Yasuhiro Shiraki | 1995-06-13 |
| 5341358 | Optical recording medium and optical recording method using the same | Hideo Kobayashi, Osamu Ueno | 1994-08-23 |
| 5295122 | Flying head of a magneto-optical recording apparatus | Akemi Murakami, Hideo Kobayashi | 1994-03-15 |
| 5268254 | Optical recording medium | Osamu Ueno, Hideo Kobayashi | 1993-12-07 |
| 5253265 | Semiconductor laser device | Yasuji Seko, Hideo Nakayama, Hideki Fukunaga, Nobuaki Ueki | 1993-10-12 |
| 5247503 | Optical recording and reproducing apparatus with separated high and low frequency servo signals | Takashi Nomiyama, Kaoru Yasukawa, Shoji Yamaguchi, Daisuke Iguchi, Akemi Murakami | 1993-09-21 |
| 5220547 | Method and device for controlling optical head moving speed | Kaoru Yasukawa, Daisuke Iguchi | 1993-06-15 |
| 5144616 | Laser diode and multibeam optical head using the laser diode | Kaoru Yasukawa | 1992-09-01 |
| 5132752 | Field effect transistor | Yasunari Umemoto, Nobuo Kotera, Norikazu Hashimoto, Nobutoshi Matsunaga, Yasuo Wada +4 more | 1992-07-21 |
| 5124770 | Field effect transistor with alpha particle protection | Yasunari Umemoto, Junji Shigeta, Norikazu Hashimoto | 1992-06-23 |
| 4683487 | Heterojunction bipolar transistor | Susumu Takahashi, Toshiyuki Usagawa, Yasunari Umemoto, Toshihisa Tsukada | 1987-07-28 |
| 4672406 | Semiconductor member and semiconductor device employing the same | Yasushi Sawada, Yoshifumi Katayama, Yasuhiro Shiraki, Makoto Morioka, Takao Kuroda +1 more | 1987-06-09 |
| 4561169 | Method of manufacturing semiconductor device utilizing multilayer mask | Masaru Miyazaki, Susumu Takahashi, Takahiro Kohashi | 1985-12-31 |
| 4546540 | Self-aligned manufacture of FET | Yasunari Umemoto, Susumu Takahashi, Michiharu Nakamura | 1985-10-15 |
| 4503599 | Method of fabricating field effect transistors | Susumu Takahashi, Yasunari Umemoto, Michiharu Nakamura | 1985-03-12 |
| 4392219 | Method and device for recording and reproducing tracking information | Norio Yokozawa, Wasao Takasugi, Seiji Yonezawa | 1983-07-05 |