Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5322539 | Quartz tank member and method of production thereof | Melvin P. Mathisen, David Butler | 1994-06-21 |
| 4404696 | Fluid velocity assist | Walter O. Heinze, Wesley M. Tufts | 1983-09-20 |