Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4748865 | Device for absorbing impulsive torque in motor with worm gear | Norio Umezawa, Katsuhiro Murano | 1988-06-07 |
| 4638203 | Attachment structure for brush holder springs | Norio Umezawa | 1987-01-20 |