Issued Patents 1982
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4331420 | Reversible unidirectional flow pump with frictionally engaged axial valve plate | — | 1982-05-25 |
| 4331421 | Reversible unidirectional flow pump with axial frictionally engaged recessed valve plate | Lawrence W. Cheney | 1982-05-25 |