Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5299441 | Method of making a mandrel comprising a drill section for a self-drilling blind rivet | — | 1994-04-05 |
| 5219253 | Recessed screw and a driver bit engageable therewith | — | 1993-06-15 |
| D335076 | Self-drilling rivet for fastening panel members | — | 1993-04-27 |
| RE33901 | Breakable composite drill screw | — | 1992-04-28 |
| 5042888 | Anchor bolt having a spring | — | 1991-08-27 |
| 4998853 | Self-drilling blind rivet and method for making same | — | 1991-03-12 |
| 4996860 | Method and apparatus for manufacturing anchor bolts for concrete | — | 1991-03-05 |
| 4958972 | Breakable composite drill screw | — | 1990-09-25 |
| 4948306 | Drill | Karl Wiedner | 1990-08-14 |
| 4881395 | Process and apparatus for fabricating stepped nails | — | 1989-11-21 |
| 4690599 | Self-piercing nut | — | 1987-09-01 |
| 4507859 | Self-piercing nut holding device | — | 1985-04-02 |
| 4407620 | Drill screw | — | 1983-10-04 |
| 4345677 | Chute-hose coupler unit for an automatic assembling machine | — | 1982-08-24 |