Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6439762 | Mainspring device and a winding protection structure | Tatsuo Hara | 2002-08-27 |
| 6422739 | Mainspring device, timepiece, and method of controlling the mainspring device and the timepiece | Tatsuo Hara | 2002-07-23 |