Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4853579 | Drive method for ultrasonic motor providing enhanced stability of rotation | Katsu Takeda, Ritsuo Inaba, Tetsuji Fukada | 1989-08-01 |
| 4829209 | Ultrasonic motor with stator projections and at least two concentric rings of electrodes | Ritsuo Inaba, Akira Tokushima, Katsu Takeda | 1989-05-09 |
| 4796049 | Heat roller for electrophotographic copying machine | Hideaki Taniguchi, Koichi Moriyama, Ken-ichi Iwamoto | 1989-01-03 |