Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5876159 | Sprocket trimming method for the multi-stage sprocket assembly | Ching-Huan Tseng, Chung-Biau Tsay, Chung-Ping Chiang, Pai-Hsiang Hsu | 1999-03-02 |
| 5409422 | Two sprocket tooth trimming methods and the structure thereof for the multi-stage sprocket assembly in a bicycle | Chan-Hua Feng, Ching-Huan Tseng, Chung-Biau Tsay, Chang-Dau Yan | 1995-04-25 |