Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5769862 | Tube knot applicator | Gene W. Kammerer, Royce Frederick, Chao-Chen Chen | 1998-06-23 |
| 5707359 | Expanding trocar assembly | — | 1998-01-13 |
| 5454820 | Method of tying knots using a tube knot applicator | Gene W. Kammerer, Royce Frederick, Chao-Chen Chen | 1995-10-03 |