Issued Patents All Time
Showing 26–50 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5260634 | Constant current driving system for a stepper motor in rotating disk | Tohro Miura, Naoki Sugeta, Tadashi Terada, Miya Enami | 1993-11-09 |
| 5107479 | Optical recording/reproducing apparatus | Tsutomu Morita | 1992-04-21 |
| 5083302 | Optical tracking servo apparatus | Makoto Syoji, Tsutomu Morita | 1992-01-21 |
| 5032934 | Magnetic disc apparatus with a cosine equalizer and specific gap length head | Shinichi Aikawa, Yoshiaki Sakai, Fumio Nagase | 1991-07-16 |
| 5010246 | Optical head apparatus applicable to optical disc apparatus | Yasushi Noda, Tsutomu Morita, Kenji Shimozawa | 1991-04-23 |
| 4984224 | Apparatus for recording and/or erasing an information signal on and from a magneto-optical disk wherein the magnetic biasing field means is part of a rotor magnet included in a stepping motor | Yasushi Noda, Keiji Uehara | 1991-01-08 |
| 4935914 | Optical recording and reproducing apparatus for verifying correct writing of information signal | Tsutomu Morita, Makoto Shouji | 1990-06-19 |
| 4926409 | Optical permitting record/playback from both sides of an optical disk | Kenji Shimozawa, Takashi Kamisaka | 1990-05-15 |
| 4926403 | Magneto-optic recording apparatus for recording information selectively on both sides of the recording medium | Kenji Shimozawa, Takashi Kamisaka | 1990-05-15 |
| 4918743 | Circuit for generating a dual purpose control signal in a disk apparatus | — | 1990-04-17 |
| 4870514 | Disk drive circuit arrangement for the suppression of undesired index pulses | Katsuya Enami | 1989-09-26 |
| 4816934 | Power-saving read/write circuit for apparatus for digital data transfer with a magnetic disk | — | 1989-03-28 |
| 4809119 | Circuit arrangement for the determination of the constant speed rotation of a disklike record medium | Katsuya Enami | 1989-02-28 |
| 4783706 | Circuit arrangement and method for saving power in magnetic disk apparatus without head displacement | Makoto Shoji, Shozo Toma, Kazuhiro Hiraki, Tsutomu Morita | 1988-11-08 |
| 4782406 | Data transfer apparatus with a disklike record medium and a method of operation therefore | Makoto Shoji, Shozo Toma, Kazuhiro Hiraki, Tsutomu Morita | 1988-11-01 |
| 4777545 | Circuit arrangement for inhibiting writing on a magnetic disk during the settling time of a transducer head | Makoto Shoji, Satoru Kikuchi | 1988-10-11 |
| 4771346 | Method and apparatus for rewriting on a magnetic disk on which data has been written by another apparatus having half the track density capability of the first apparatus | Makoto Shoji, Yoshiaki Sakai | 1988-09-13 |
| 4754344 | Method and apparatus for formatting magnetic disks with use of host equipment programmed for smaller capacity magnetic disks | Makoto Shoji | 1988-06-28 |
| 4700243 | Power saving circuit arrangement for an apparatus for data transfer with flexible magnetic disk or the like | Tsutomu Morita, Makoto Shoji | 1987-10-13 |
| 4697129 | Stepping motor drive system and method capable of stopping the rotor in a required angular position | Katsuya Enami, Takahiro Sakaguchi | 1987-09-29 |
| 4691255 | Power saving circuit arrangement for data transfer apparatus with a disklike record medium | Yoshiaki Sakai | 1987-09-01 |
| 4688112 | Power-saving data transfer apparatus with a flexible magnetic disk or the like | Makoto Shoji, Shozo Toma, Kazuhiro Hiraki, Tsutomu Morita | 1987-08-18 |
| 4688131 | Information processing apparatus having locking means permitting ready detachment of the magnetic disk drive assembly | Yasushi Noda, Toshihiro Kitahara | 1987-08-18 |
| 4677359 | Stepping motor drive method and system capable of stopping the rotor in a required angular position | Katsuya Enami, Takahiro Sakaguchi | 1987-06-30 |
| 4677510 | Data transfer apparatus with a disklike record medium | Makoto Shoji, Shozo Toma, Kazuhiro Hiraki, Tsutomu Morita | 1987-06-30 |