Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7273174 | Optical pen having a light path coaxial with its pen tip | Shih-Yuan Chang | 2007-09-25 |
| D549229 | Optical pen with page-scrolling feature | — | 2007-08-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7273174 | Optical pen having a light path coaxial with its pen tip | Shih-Yuan Chang | 2007-09-25 |
| D549229 | Optical pen with page-scrolling feature | — | 2007-08-21 |