Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7913858 | Acid-neutralizing filter media | William C. Haberkamp, Barry M. Verdegan | 2011-03-29 |
| 7250126 | Acid-neutralizing filter media | William C. Haberkamp, Barry M. Verdegan | 2007-07-31 |
| 6860241 | Fuel filter including slow release additive | Harold R. Martin, Joseph C. Drozd, Yu-Sen Chen | 2005-03-01 |
| 6319402 | Extended life dual full-flow and bypass filter | Brian W. Schwandt, Peter K. Herman | 2001-11-20 |
| 6273031 | Clean lubricant circulation system | Barry M. Verdegan, Peter K. Herman, Brian W. Schwandt, Stephen L. Fallon | 2001-08-14 |
| 6238554 | Fuel filter including slow release additive | Harold R. Martin | 2001-05-29 |
| 6082322 | Electronically controlled continuous lubricating oil replacement system | John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black +1 more | 2000-07-04 |
| 5970942 | Electronically controlled continuous lubricating oil replacement system | David E. Koeberlein, Paul D. Cantrell, Eric S. Keith, John P. Graham, Jerry C. Wang +4 more | 1999-10-26 |
| 5881688 | Electronically controlled continuous lubricating oil replacement system | John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black +1 more | 1999-03-16 |
| 5749339 | Electronically controlled continuous lubricating oil replacement system | John P. Graham, Jerry C. Wang, Leslie A. Roettgen, Donald P. Carver, Colin I. Black +1 more | 1998-05-12 |