Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373767 | Trimming tool for trimming drawn parts and for simultaneous transverse cutting | — | 1994-12-20 |
| 4656914 | Stool and auxiliary pedal for a keyboard instrument | Ngai H. Cheung | 1987-04-14 |