Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5361478 | Method of inserting a hole forming and selftapping screw | Gunter Kretschmer, Horst Klees, Ali Hakan Guven | 1994-11-08 |
| 5234301 | Hole forming and selftapping screw | Gunter Kretschmer, Horst Klees | 1993-08-10 |
| 4544313 | Self-tapping screw | — | 1985-10-01 |