Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888514 | Driving apparatus for ultrasonic motor | Ken Takahashi, Nobukazu Sugano, Horiyuki Harao, Yukihiro Matsuyama, Hiromi Tanoue +1 more | 1989-12-19 |
| 4853579 | Drive method for ultrasonic motor providing enhanced stability of rotation | Osamu Kawasaki, Katsu Takeda, Tetsuji Fukada | 1989-08-01 |
| 4829209 | Ultrasonic motor with stator projections and at least two concentric rings of electrodes | Osamu Kawasaki, Akira Tokushima, Katsu Takeda | 1989-05-09 |