Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4748611 | Information recording medium and method for reproducing the same | Toshiaki Tsuyoshi, Masatoshi Otake, Sachio Kumagai, Kazuo Ichino, Wasao Takasugi | 1988-05-31 |
| 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 | Masatoshi Ohtake, Masaru Ito, Toshiaki Tsuyoshi, Kazuo Ichino, Harushige Nakagaki | 1988-05-31 |
| 4710909 | Phase compensation apparatus for an optical information recording and reproducing system | Toshiaki Tsuyoshi, Masuo Kasai, Motoo Uno | 1987-12-01 |
| 4707816 | Method and apparatus for composite wobbled and push-pull tracking servo system | Masatoshi Ohtake, Masaru Ito, Toshiaki Tsuyoshi, Kazuo Ichino, Harushige Nakagaki | 1987-11-17 |
| 4703408 | Apparatus and record carrier for optically writing information | Yasunori Kanazawa, Toshiaki Tsuyoshi | 1987-10-27 |
| 4688880 | Hologram lens | Kimio Tatsuno, Keiji Kataoka | 1987-08-25 |
| 4646279 | Optical disk cutting apparatus using multiple beams | — | 1987-02-24 |
| 4564929 | Information recording and reproducing apparatus with tracking control by sampling | Tatsuo Horikoshi, Toshiaki Tsuyoshi, Wasao Takasugi | 1986-01-14 |
| 4541082 | Device for optically tracking information | Tatsuo Horikoshi, Toshiaki Tsuyoshi, Hiroshi Tooyama, Masatoshi Otake | 1985-09-10 |
| 4504937 | Optical information tracking apparatus | Tatsuo Horikoshi, Toshiaki Tsuyoshi | 1985-03-12 |
| 4411500 | Optical system for reproducing information | Toshio Sugiyama | 1983-10-25 |
| 4407880 | Substrate of member for recording information with light and method of manufacturing the same | Motoyasu Terao, Shinkichi Horigome, Kazuo Shigematsu, Yoshinori Miyamura | 1983-10-04 |
| 4392219 | Method and device for recording and reproducing tracking information | Norio Yokozawa, Wasao Takasugi, Kiichi Ueyanagi | 1983-07-05 |
| 4364118 | Optical disk and optical information processor | Takeshi Maeda, Kazuo Shigematsu | 1982-12-14 |
| 4357616 | Recording medium | Motoyasu Terao, Yoshio Taniguchi, Shinkichi Horigome, Kazuo Shigematsu, Masahiro Ojima +1 more | 1982-11-02 |
| 4348461 | Recording member | Motoyasu Terao, Yoshio Taniguchi, Shinkichi Horigome, Masahiro Ojima, Kazuo Shigematsu +2 more | 1982-09-07 |
| 4333173 | Optical information processor with prismatic correction of laser beam shape | Toshio Sugiyama, Masahiro Ojima | 1982-06-01 |
| 4296419 | Member for recording information | Motoyasu Terao, Kazuo Shigematsu, Masahiro Ojima | 1981-10-20 |
| 4241240 | Optical information recording apparatus | Kazuo Shigematsu, Keizo Kato, Toshimitsu Miyauchi, Fumiyuki Inose, Kimio Tatsuno +1 more | 1980-12-23 |
| 4238803 | Information recording methods using lasers | Motoyasu Terao | 1980-12-09 |
| 4235507 | Optical system to condense light from a semiconductor laser into a circular spot | Keiji Kataoka | 1980-11-25 |
| 4223187 | Method and apparatus for recording and reproducing a video-disc with an oscillated track | Teruichi Tomura, Akira Fukuhara, Keizo Kato, Masuo Umemoto | 1980-09-16 |