Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6541760 | Rotation detecting apparatus detecting rotation operation by light transmission to prevent invalid detection | Yasuji Hagiwara | 2003-04-01 |
| 6537154 | Game controller | Shuzo Ono | 2003-03-25 |