Issued Patents All Time
Showing 26–34 of 34 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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, Isao Satoh, Tatuo Sugimura | 1988-12-06 |
| 4769804 | Optical data recording and reproducing apparatus with erase function diagnosis | Isao Satoh, Yoshihisa Fukushima, Yuzuru Kuroki, Yuji Takagi | 1988-09-06 |
| 4768181 | Apparatus for determining defective or non-used sectors of an optical dish | Isao Satoh, Tatuo Sugimura, Yuzuru Kuroki | 1988-08-30 |
| 4742507 | Optical information recording and reproducing apparatus having defective-sector marking means | Yuzuru Kuroki, Isao Satoh, Tatuo Sugimura | 1988-05-03 |
| 4653051 | Apparatus for detecting and correcting errors on product codes | Tatuo Sugimura, Isao Satoh, Yuzuru Kuroki | 1987-03-24 |
| 4630140 | Data recording/reproducing apparatus | Tatuo Sugimura, Isao Satoh, Yuzuru Kuroki | 1986-12-16 |
| 4544957 | Time base correction apparatus | Mitsuro Moriya | 1985-10-01 |
| 4420828 | Optical recording and/or reproducing device | Tomio Yoshida, Michiyoshi Nagashima, Shunji Harigae, Noboru Wakami | 1983-12-13 |
| 4328506 | Optical recording device | Tomio Yoshida, Michiyoshi Nagashima, Shunji Harigae, Noboru Wakami | 1982-05-04 |