Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4278449 | Method for improving the quality of abrasive grains | Harald Helletsberger, Anton Aichhorn | 1981-07-14 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4278449 | Method for improving the quality of abrasive grains | Harald Helletsberger, Anton Aichhorn | 1981-07-14 |