Issued Patents All Time
Showing 51–62 of 62 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5809201 | Specially formatted optical disk and method of playback | — | 1998-09-15 |
| 5754506 | Optical disk drive and optical disk having address pits for sectors in land and groove tracks | Kouichi Komawaki, Tsuyoshi Katayama | 1998-05-19 |
| 5725168 | Magnetic recording and reproducing apparatus for controlling the tension of a magnetic tape | Eiji Yokoyama, Kazuo Mori, Seiji Kishikawa, Masami Tomita, Nobuzumi Kurihara | 1998-03-10 |
| 5699342 | Method of and device for recording and playing back an optical disk having a test playback region utilizing pits of minimum size for controlling the power of the laser | Kosuke Yagi, Naoyuki Egusa | 1997-12-16 |
| 5602688 | Method and apparatus for controlling surface pressure exerted on a movable magnetic head by a recording medium | Eiji Yokoyama | 1997-02-11 |
| 5566378 | Movable head position controlling device for magnetic recording and reproducing apparatuses | Eiji Yokoyama | 1996-10-15 |
| 5481417 | Tape tension control for a magnetic recording and reproducing apparatus that adjusts spacing error based on the reproduced signal envelope | Eiji Yokoyama | 1996-01-02 |
| 5404252 | Movable head position controlling device for magnetic recording and reproducing apparatuses | Eiji Yokoyama | 1995-04-04 |
| 5395066 | Tape tension control for a magnetic recording and reproducing apparatus | Eiji Yokoyama | 1995-03-07 |
| 5384676 | Magnetic head position controller in a magnetic recording and reproducing apparatus | Eiji Yokoyama | 1995-01-24 |
| 5343342 | Magnetic recording and playback system with feedback control of a movable transducer head | Yuji Kanagawa, Eiji Yokoyama, Kimihide Nakatsu, Toshiharu Miyago | 1994-08-30 |
| 5157563 | Magnetic recording and reproducing apparatus using an electromagnetic actuator for automatic tracking | Eiji Yokoyama | 1992-10-20 |