Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6108919 | Automatic optical plumbing instrument | Chyi-Yiing Wu | 2000-08-29 |
| 6035540 | Automatic optical levelling, plumbing, and verticality-determining apparatus | Chyi-Yiing Wu | 2000-03-14 |