Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4827831 | Reciprocating device and switching mechanism therefor | F. Scott Hartley | 1989-05-09 |
| 4827832 | Valve system for a reciprocating device | F. Scott Hartley | 1989-05-09 |
| 4797069 | Pump with variable angle wobble plate | F. Scott Hartley | 1989-01-10 |