Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4870514 | Disk drive circuit arrangement for the suppression of undesired index pulses | Hiroshi Tsuyuguchi | 1989-09-26 |
| 4825309 | Circuit arrangement for the selective suppression and nonsuppression of read output in magnetic disk apparatus | Makoto Shoji | 1989-04-25 |
| 4811140 | Magnetic data transfer apparatus having improved transducer coil arrangement | Sinobu Kawamura, Fumio Nagase, Shinichi Aikawa | 1989-03-07 |
| 4809119 | Circuit arrangement for the determination of the constant speed rotation of a disklike record medium | Hiroshi Tsuyuguchi | 1989-02-28 |