Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11635076 | Variable displacement vane pump with improved pressure control and range | Douglas G. Hunter, Fuzheng Hu, Matthew J. Jannausch | 2023-04-25 |
| 8961148 | Unified variable displacement oil pump and vacuum pump | Douglas G. Hunter | 2015-02-24 |
| 7396214 | Variable displacement pump and control therefor | Douglas G. Hunter | 2008-07-08 |
| 7018178 | Variable displacement pump and control therefore for supplying lubricant to an engine | Douglas G. Hunter | 2006-03-28 |
| 5205707 | Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances | John E. Smith, William E. Ruhig, Jr. | 1993-04-27 |