Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5915890 | Method and device for influencing the run of deep hole drilled passages | Heinz-Michael Zaoralek | 1999-06-29 |
| 5351399 | Method for forming grooves in roll surfaces | Hans-Friedrich Neuhoffer, Erich Vomhoff | 1994-10-04 |