Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5289811 | Purge control device | Charles H. Covert, William E. Gifford, Otto Muller-Girard, Jr., Gordon R. Paddock | 1994-03-01 |
| 5253629 | Flow sensor for evaporative control system | William E. Gifford, Karen M. Meyer, Otto Muller-Girard, Jr., Harold Milton Haskew | 1993-10-19 |
| 4805582 | Exhaust gas recirculation valve | Charles W. Braun, Dwight O. Palmer | 1989-02-21 |
| 4792114 | Vacuum regulator valve unit | James Gaffney, Thaddeus J. Grey | 1988-12-20 |
| 4765504 | Vapor venting valve for vehicle fuel system | Carl H. Sherwood, Roy A. Giacomazzi | 1988-08-23 |
| 4725040 | Exhaust gas recirculation valve assembly | Peter R. Wendt | 1988-02-16 |
| 4724861 | Fuel tank venting | Charles H. Covert, Roy A. Giacomazzi, William E. Gifford, Carl H. Sherwood | 1988-02-16 |
| 4706708 | Fuel tank venting | William E. Gifford, Daniel Nolan, Carl H. Sherwood | 1987-11-17 |
| 4683862 | Fuel vapor storage canister | William E. Gifford, Karen M. Meyer | 1987-08-04 |