Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4645414 | Combined vacuum pump, bearing and seal assembly | Arnold O. DeHart | 1987-02-24 |
| 4573690 | Sealing surface and method | Arnold O. DeHart | 1986-03-04 |
| 4572516 | Low friction dynamic seal assembly with centrifugal deflection | Ronald J. Dershem, Arnold O. DeHart | 1986-02-25 |
| 4441349 | Method of making a cast iron sealing ring | — | 1984-04-10 |
| 4300777 | Fluid seal | — | 1981-11-17 |