Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5229896 | Disk drive and method of controlling the same | Souichi Tohyama, Hiromu Hirai, Haruaki Otsuki | 1993-07-20 | $69,000 |
| 4956789 | Method and apparatus for driving a servo system while suppressing residual vibration generated during position control | Hiromu Hirai, Isao Kobayashi | 1990-09-11 | $42,000 |