Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7052252 | Port configuration for fuel pump unit for facilitating pressure feedback | — | 2006-05-30 |
| 6835062 | Fuel oil supply circuit for an oil burner having a solenoid valve in parallel circuit with diaphragm valve for controlling oil flow at start up | Bill Mitchell, David Zierke | 2004-12-28 |
| 6668851 | Fool-proof plug in fluid system | Jack Price | 2003-12-30 |
| 6155804 | Sound attenuating motor end shield for a hydraulic pump | Julie Harwath, Frank L. Harwath | 2000-12-05 |
| 6129176 | Sound attenuating motor end shield | Julie Harwath, Frank L. Harwath | 2000-10-10 |
| 5692680 | Fuel supply unit for an oil burner | Frank L. Harwath | 1997-12-02 |
| 5368068 | Relief valve for the fuel pump of an oil burner | Frank L. Harwath | 1994-11-29 |
| 4578948 | Reversible flow vane pump with improved porting | Allan I. Hutson | 1986-04-01 |
| 4490105 | Fuel supply system for a recirculating fuel burner | Frank L. Harwath | 1984-12-25 |
| 4391580 | Liquid fuel supply system for an atomization burner nozzle | Frank L. Harwath | 1983-07-05 |