Issued Patents All Time
Showing 176–200 of 228 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5233589 | Method for recording/reproducing information having a function of correcting variations in the interval in reproduced data and apparatus for realizing same | Atsushi Saito, Shinichi Arai, Satoshi Kawamura, Takuya Mizokami | 1993-08-03 |
| 5214629 | Optical disc having a high-speed access capability and reading apparatus therefor | Hitoshi Watanabe | 1993-05-25 |
| 5204764 | Electro-optical device having a first and a second nonlinear resistance element formed on each pixel electrode | Koji Iwasa | 1993-04-20 |
| 5109374 | Small-sized optical memory device and information processing apparatus utilizing cylindrically shaped information recording medium | Yoshito Tsunoda, Hiroshi Yasuoka | 1992-04-28 |
| 5105409 | Method and apparatus for optical recording and reproduction with tracking servo reducing track offset | Toshimitsu Kaku, Kazuo Shigematsu, Hisataka Sugiyama, Masahiro Takasago | 1992-04-14 |
| 5084860 | Apparatus for optical disc memory with correction pattern and master disc cutting apparatus | Yoshito Tsunoda, Kazuo Shigematsu, Toshimitsu Kaku | 1992-01-28 |
| 5073880 | Information recording/reproducing method and apparatus | Yoshito Tsunoda | 1991-12-17 |
| 5062091 | Magneto-optical recording method and apparatus capable of overwriting data using a radiation beam | Norio Ohta, Yoshio Suzuki, Masahiko Takahashi | 1991-10-29 |
| 5060208 | Magnetooptical recording method and apparatus utilizing shift adjustment | Nobuyuki Nagai, Atsushi Saito, Takeshi Nakao, Hitoshi Watanabe | 1991-10-22 |
| 5034941 | Optical disk apparatus having auto-focusing servo systems for multiple light spots and method of starting the auto-focusing servo systems | Masuo Kasai, Kiyoshi Matsumoto | 1991-07-23 |
| 5034940 | Information retrieval system with a tracking error threshold compensation of retrieved data and tracking error signals | Atsushi Saito | 1991-07-23 |
| 4985616 | Optical card having optical grooves for access and wobbled marks for tracking and a recording-reproducing apparatus therefor | Shigeru Nakamura, Yoshito Tsunoda | 1991-01-15 |
| 4980877 | Optical recording and reproducing system with high track density and low cross-talk | Hisataka Sugiyama, Atsushi Saito | 1990-12-25 |
| 4969137 | Optical recording and reproducing apparatus having a multi-spot positioning control mechanism | Hisataka Sugiyama, Atsushi Saito, Fumio Hara | 1990-11-06 |
| 4961182 | Information retrieving system with level clamping | Atsushi Saito | 1990-10-02 |
| 4956001 | Method and apparatus for bending and annealing glass sheets to be laminated | Katsuhiko Kitagawa | 1990-09-11 |
| 4952787 | Method and apparatus for detecting focus error using pits and light beams having astigmatism | Shigeru Nakamura | 1990-08-28 |
| 4949331 | Apparatus and record carrier for optical disc memory with correction pattern and master disc cutting apparatus | Yoshito Tsunoda, Kazuo Shigematsu, Toshimitsu Kaku | 1990-08-14 |
| 4901325 | Semiconductor laser device | Takeshi Kato, Kenichi Mizuishi, Katuaki Chiba, Takeshi Nakao, Masahiro Ojima +1 more | 1990-02-13 |
| 4866692 | Method and apparatus for information recording and reproduction of a pit-shape-forming optical recording type | Atsushi Saito, Hisataka Sugiyama, Wasao Takasugi | 1989-09-12 |
| 4866687 | Optical disc access method and optical disk storage using coarse and fine actuators | Masuo Kasai, Kazuo Shigematsu, Toshimitsu Kaku, Masahiro Takasago | 1989-09-12 |
| 4866688 | Composite tracking servo system for optical disc apparatus with track offset correction | Masatoshi Ohtake, Seiji Yonezawa, Toshiaki Tsuyoshi, Kazuo Ichino, Yukio Fukui +2 more | 1989-09-12 |
| 4855991 | Optical disk having track offset detection areas | Toshimitsu Kaku, Yoshito Tsunoda, Shigeru Nakamura | 1989-08-08 |
| 4835759 | Method and apparatus for compensating variation of read data in an optical data storage | Atsushi Saito, Hisataka Sugiyama, Kazuo Shigematsu, Wasao Takasugi | 1989-05-30 |
| 4835756 | Optical memory apparatus using an optical disc having guide-grooves of V-shape and predetermined optical depth and access method therefor | Toshimitsu Kaku, Shigeru Nakamura, Masaru Ito, Kazuo Shigematsu, Yoshito Tsunoda | 1989-05-30 |