Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5685680 | Coated threaded fasteners with coating-free crests | Richard J. Duffy | 1997-11-11 |
| 5221170 | Coated threaded fasteners | Richard J. Duffy, Gregory A. Fruehe, Max F. Dorflinger | 1993-06-22 |
| RE33766 | Coated fasteners and process for making the same | Richard J. Duffy, Gregory A. Fruehe | 1991-12-10 |