Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862590 | Retractable blade knife | Frank L. Winyard, Cvetan Petroff | 1989-09-05 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862590 | Retractable blade knife | Frank L. Winyard, Cvetan Petroff | 1989-09-05 |