Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE40414 | Optical pickup apparatus | Yoshitaka Takahashi, Hiroshi Akiyama | 2008-07-01 |
| 5870370 | Optical pickup apparatus | Yoshitaka Takahashi, Hiroshi Akiyama | 1999-02-09 |
| 5815473 | Optical pickup device for detecting tracking error of optical disks with different track pitches | Yoshitaka Takahashi | 1998-09-29 |
| 5694385 | Optical pickup apparatus | Yoshitaka Takahashi, Hiroshi Akiyama | 1997-12-02 |
| 5337302 | Optical data recording/reproduction apparatus for use with semiconductor lasers as a light source | Hiroshi Gotoh, Kiyoshi Yokomori | 1994-08-09 |
| 5073888 | Optical pickup device | Yoshitaka Takahashi, Hiroshi Koide, Hiroshi Gotoh, Syuichi Honda | 1991-12-17 |
| 5070494 | Optical pickup device with dual-mode drive mechanism | Masanobu Nishimiya, Akihiko Okamoto | 1991-12-03 |
| 5025438 | Recording and reproducing optical information device which converts the first beam into a second beam having different light intensity distribution | — | 1991-06-18 |
| 4687916 | Optical pick-up device for both focus and error tracking detection | Hideo Inuzuka | 1987-08-18 |
| 4684799 | Focus detection method involving cutting more than half of light beam reflected from disc | Hideo Inuzuka | 1987-08-04 |
| 4683559 | Optical pickup with a two-detector arrangement | Hiroshi Gotoh, Hideo Inuzuka | 1987-07-28 |
| 4636625 | Method and device for detecting focal point | Masanobu Nishimiya, Hiroyuki Kiguchi | 1987-01-13 |
| 4436415 | Exposure process for use in a variable magnification copying machine | — | 1984-03-13 |
| RE31371 | Developing system | Shoji Kuroishi, Tsuguo Kimura, Shiro Yamamoto | 1983-09-06 |