Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640914 | Percussion borer for forming bores in stone material | Erich Wisser, Marcel John, Bernhard Sander, Hanspeter Schad, Cord-Henrik Surberg +2 more | 2003-11-04 |
| 6012358 | Setting tool for self-cutting undercut anchors | Erich Wisser, Helmut Gassner, Susanne Kossian, Rainer Kussmaul, Hermann Beck +1 more | 2000-01-11 |
| 5988964 | Drive-in dowel | Erich Wisser, Helmut Gassner, Susanne Kossian, Michael Werner | 1999-11-23 |
| 5807049 | Spreading anchor with undercut-forming cutting means | Hermann Beck, Helmut Gassner, Markus Hartmann, Susanne Kossian, Rainer Kussmaul +2 more | 1998-09-15 |
| 5772372 | Spreading anchor | Erich Wisser, Helmut Gassner, Susanne Kossian, Rainer Kussmaul, Hermann Beck +1 more | 1998-06-30 |
| 4978258 | Cutting tool | — | 1990-12-18 |