Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5200729 | Permanent magnet and magnetization apparatus for producing the permanent magnet | Shuzo Otsuki, Masaru Wada | 1993-04-06 |
| 4952860 | Motor control system | — | 1990-08-28 |
| 4804900 | Control apparatus for synchronous motors | — | 1989-02-14 |
| 4274037 | Motor speed control system | — | 1981-06-16 |
| 4251796 | Slide-type potentiometer | Mitsuhiro Oyama, Fumio Sakuma | 1981-02-17 |
| 4246521 | DC Motor speed control system | Mitsuhiro Oyama, Fumio Sakuma | 1981-01-20 |
| 4228383 | Speed control circuit arrangement for an AC commutator motor | Mitsuhiro Oyama, Fumio Sakuma, Tadashi Nakajima | 1980-10-14 |