Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5337521 | Valve grinder | David M. Terpstra | 1994-08-16 |
| 4383542 | Cleaning machine | Wayne H. Hanson, Bradley D. Krause, Richard C. Kravik, Gerald P. Lawson, Jerry L. Schueler | 1983-05-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5337521 | Valve grinder | David M. Terpstra | 1994-08-16 |
| 4383542 | Cleaning machine | Wayne H. Hanson, Bradley D. Krause, Richard C. Kravik, Gerald P. Lawson, Jerry L. Schueler | 1983-05-17 |