Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5507801 | Compression drill guide | Stephan M. Perren | 1996-04-16 |
| 5180382 | Bone screw | Robert Frigg, Stephan M. Perren, Martin Allgower | 1993-01-19 |
| 5041119 | Angular attachment for drill | Robert Frigg, Guido Scandella | 1991-08-20 |
| 5019078 | Bone screw | Stephen Perren, Robert Frigg, Robert Mathys | 1991-05-28 |
| 4803976 | Sighting instrument | Robert Frigg, Stephan M. Perren, Urs Jenny, Gebhard Ritter | 1989-02-14 |
| 4341206 | Device for producing a hole in a bone | T. Robert Perrett, Franz Sutter | 1982-07-27 |