Issued Patents 1997
Showing 1–1 of 1 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, Akira Takakura | 1997-09-16 |
Showing 1–1 of 1 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, Akira Takakura | 1997-09-16 |