Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D305096 | Retractable blade knife | Wallace Tench, Cvetan Petroff, Gordon Bremmer | 1989-12-19 |
| D303921 | Utility knife or similar article | Alfred Blochlinger, Cvetan Petroff, Wallace Tench | 1989-10-10 |
| D303731 | Knife scabbard | Alfred Blochlinger, Cvetan Petroff, Wallace Tench | 1989-10-03 |