Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8381580 | Tire pressure monitoring device with inclinable valve stem | Hsin-Chieh Chen | 2013-02-26 |
| 7757550 | Valve stem with an adjustable tire pressure detector | Hung-Chih Yu | 2010-07-20 |
| 7703316 | Valve stem assembly for tire pressure detecting systems | Hung-Chih Yu | 2010-04-27 |