Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305096 | Retractable blade knife | Wallace Tench, Christopher Collins, Cvetan Petroff | 1989-12-19 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305096 | Retractable blade knife | Wallace Tench, Christopher Collins, Cvetan Petroff | 1989-12-19 |