Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831305 | Vibration wave motor | Akira Hiramatsu | 1989-05-16 |
| 4829371 | Film reading apparatus which reads an unexposed portion of a film to determine its type | Akira Hiramatsu, Takashi Kawabata, Koichi Washisu | 1989-05-09 |