Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640914 | Percussion borer for forming bores in stone material | Erich Wisser, Bernhard Sander, Hanspeter Schad, Cord-Henrik Surberg, Charles C. Coffin +2 more | 2003-11-04 |
| 6592286 | Fixing member for use with a setting material | Cord-Henrick Surberg, Ralf Laternser, Michael Siemers, Pietro Bianchi, Gerhard Kock | 2003-07-15 |
| 6543977 | Concrete anchor bolt | Bernhard Sander, Joachim Gunther, Michael Siemers, Pietro Bianchi, Erich Wisser | 2003-04-08 |
| 6454506 | Anchor bolt with an outer thread having thread turns with different cross-sectional shape | Kai-Uwe Keller, Jurgen Wieser | 2002-09-24 |