Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4773893 | Sprocket tooth speed varying sprocket assembly | Shun-Chih Chen | 1988-09-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4773893 | Sprocket tooth speed varying sprocket assembly | Shun-Chih Chen | 1988-09-27 |