Issued Patents All Time
Showing 101–125 of 135 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868820 | Method for illuminating adjoining slants of an optical disk having a V-shaped groove | Michiyoshi Nagashima | 1989-09-19 |
| 4866717 | Code error detecting and correcting apparatus | Katsumi Murai, Makoto Usui | 1989-09-12 |
| 4841498 | Information recording/reproducing apparatus with means for substituting predetermined good sectors for defective ones | Tatuo Sugimura, Yoshihiko Imai, Makoto Ichinose | 1989-06-20 |
| 4833663 | Information recording/reproducing apparatus for handling defective sectors on an optical disk | Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki, Yuji Takagi | 1989-05-23 |
| 4823333 | Optical disk duplicating apparatus using sector data identification information for controlling duplication | Yoshihisa Fukushima, Makoto Ichinose, Yuzuru Kuroki, Yuji Takagi | 1989-04-18 |
| 4821254 | Information recording and reproducing apparatus which detects deterioration of a medium in each sector before recording | Yoshihisa Fukushima, Makoto Ichinose, Yuzuru Kuroki, Yuji Takagi | 1989-04-11 |
| 4821253 | Optical disk and optical disk apparatus with error correction | Makoto Usui, Katsumi Murai | 1989-04-11 |
| 4805046 | Information recording and reproducing apparatus using sectors divided into a plurality of frames and having means for proper storage of the frame data | Yuzuru Kuroki, Makoto Ichinose, Yoshihisa Fukushima, Yuuji Takagi | 1989-02-14 |
| 4799208 | Optical recording and reproducing apparatus having erasing function with controllable erasing beam | Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki, Yuuji Takagi | 1989-01-17 |
| 4789911 | Information recording and reproducing apparatus | Yoshihisa Fukushima, Makoto Ichinose, Yuzuru Kuroki, Yuuji Takagi | 1988-12-06 |
| 4789974 | Optical information recording/reproducing apparatus | Yuzuru Kuroki, Makoto Ichinose, Katsumi Murai | 1988-12-06 |
| 4789979 | Optical disk exclusively used for reproduction wherein guide grooves located between data managing information and data recording regions have no track address sections | Shigehiko Hiraoka, Makoto Ichinose, Tatuo Sugimura | 1988-12-06 |
| 4774700 | Information recording and reproducing apparatus with detection and management of defective sectors | Yoshihisa Fukushima | 1988-09-27 |
| 4769804 | Optical data recording and reproducing apparatus with erase function diagnosis | Makoto Ichinose, Yoshihisa Fukushima, Yuzuru Kuroki, Yuji Takagi | 1988-09-06 |
| 4768181 | Apparatus for determining defective or non-used sectors of an optical dish | Makoto Ichinose, Tatuo Sugimura, Yuzuru Kuroki | 1988-08-30 |
| 4759006 | Abnormal track skipping detection and control arrangement | Kenji Koishi, Tomio Yoshida, Shunji Ohara, Yuzuru Kuroki | 1988-07-19 |
| 4742517 | Interleaving circuit | Yuji Takagi, Tatsuo Sugimura | 1988-05-03 |
| 4742507 | Optical information recording and reproducing apparatus having defective-sector marking means | Yuzuru Kuroki, Makoto Ichinose, Tatuo Sugimura | 1988-05-03 |
| 4736352 | Optical recording medium and apparatus for recording and reproducing data therein | Tamotsu Matsuo | 1988-04-05 |
| 4695993 | Optical information recording and reproducing apparatus and optical disc | Yuuji Takagi, Tatsuo Sugimura | 1987-09-22 |
| 4689780 | Optical recording and reproducing head | Shunji Ohara, Tomio Yoshida, Kenji Koishi | 1987-08-25 |
| 4688203 | Optical recording and reproducing apparatus | Kenji Koishi, Tamotsu Matsuo | 1987-08-18 |
| 4653051 | Apparatus for detecting and correcting errors on product codes | Tatuo Sugimura, Makoto Ichinose, Yuzuru Kuroki | 1987-03-24 |
| 4630140 | Data recording/reproducing apparatus | Tatuo Sugimura, Makoto Ichinose, Yuzuru Kuroki | 1986-12-16 |
| 4566088 | Optical and reversible recording and reproducing apparatus | Tomio Yoshida, Shunji Ohara, Kenji Koishi, Yuzuru Kuroki | 1986-01-21 |