Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668414 | Spring driven electricity generator with a control circuit to regulate the release of energy in the spring | Osamu Takahashi, Yabe Hiroshi | 1997-09-16 |
| 5615178 | Electronic control timepiece | Osamu Takahashi | 1997-03-25 |