Issued Patents 2003
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640914 | Percussion borer for forming bores in stone material | Erich Wisser, Marcel John, Bernhard Sander, Hanspeter Schad, Charles C. Coffin +2 more | 2003-11-04 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6640914 | Percussion borer for forming bores in stone material | Erich Wisser, Marcel John, Bernhard Sander, Hanspeter Schad, Charles C. Coffin +2 more | 2003-11-04 |