Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7357867 | Filter element for keyed latch valve | Steven R. Knight | 2008-04-15 |
| 5386843 | Venting apparatus and system for marine craft fuel tank | — | 1995-02-07 |
| 5244571 | Fuel filter assembly with heater | Kenneth N. Wynne, Darwin L. Brooks, Walter H. Stone, Peter Popoff | 1993-09-14 |
| 4997555 | Fuel filter assembly with heater | Ken N. Wynne, Darwin L. Brooks, Walter H. Stone, Peter Popoff | 1991-03-05 |
| 4976285 | Universal self-venting drain valve | Victor R. Oelschlaegel, J. Donald Emery | 1990-12-11 |
| 4855041 | Fluid filter drain assembly | Steve A. Neff | 1989-08-08 |
| 4836923 | Cartridge and cover assembly for fluid filters | Peter Popoff, Walter H. Stone | 1989-06-06 |
| 4740299 | Filter assembly with threaded collection bowl | Peter Popoff, Walter H. Stone | 1988-04-26 |
| 4692245 | Filter assembly with high pressure connection to collection bowl | Walter H. Stone | 1987-09-08 |
| 4619764 | Repelling-action filter unit and assembly | Walter H. Stone, Richard E. Schaupp | 1986-10-28 |