Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640914 | Percussion borer for forming bores in stone material | Erich Wisser, Marcel John, Bernhard Sander, Cord-Henrik Surberg, Charles C. Coffin +2 more | 2003-11-04 |
| 6557653 | Working tool for a percussion power tool | Udo Hauptmann, Martin Richter, Franz Popp, Josef Fünfer, Konrad Artmann +1 more | 2003-05-06 |