Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5657876 | Abrasive grit material recovery system | John Charles Drenter, Dieter A. Konitzer, Jr. | 1997-08-19 |
| 5622265 | Abrasive grit material recovery system | John Charles Drenter, Dieter A. Konitzer, Jr. | 1997-04-22 |
| 5520288 | Abrasive grit material recovery system | John Charles Drenter, Dieter A. Konitzer, Jr. | 1996-05-28 |