Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6428259 | Self-drilling screw | Chin-Sun Chen | 2002-08-06 |
| RE36741 | Self-countersinking screw with cutting receiving pockets | Uli Walther | 2000-06-20 |
| 5683217 | Self-counter-sinking screw with cutting receiving pockets | Uli Walther | 1997-11-04 |