Issued Patents 2003
Showing 1–3 of 3 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 |