Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866688 | Composite tracking servo system for optical disc apparatus with track offset correction | Masatoshi Ohtake, Seiji Yonezawa, Toshiaki Tsuyoshi, Yukio Fukui, Takashi Takeuchi +2 more | 1989-09-12 |
| 4748609 | Method and apparatus for composite tracking servo system with track offset correction and rotary optical disc having at least one correction mark for correcting track offset | Seiji Yonezawa, Masatoshi Ohtake, Masaru Ito, Toshiaki Tsuyoshi, Harushige Nakagaki | 1988-05-31 |
| 4748611 | Information recording medium and method for reproducing the same | Toshiaki Tsuyoshi, Masatoshi Otake, Sachio Kumagai, Wasao Takasugi, Seiji Yonezawa | 1988-05-31 |
| 4707816 | Method and apparatus for composite wobbled and push-pull tracking servo system | Seiji Yonezawa, Masatoshi Ohtake, Masaru Ito, Toshiaki Tsuyoshi, Harushige Nakagaki | 1987-11-17 |
| 4297676 | Mark signal amplifier | Shigeru Moriya, Nobuo Hamamto, Kanji Ozawa | 1981-10-27 |
| 4286154 | Method of detecting a mark by an electron beam and an apparatus therefor | Tsuneo Okubo, Nobuo Hamamoto | 1981-08-25 |
| 4254368 | Apparatus for driving a motor | Satoshi Ido, Nobuo Hamamoto | 1981-03-03 |