Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4619764 | Repelling-action filter unit and assembly | John F. Church, Richard E. Schaupp | 1986-10-28 |
| 4565629 | Filter assembly | Michael E. Wilson, Jr., David R. Olson, Robin B. MacDonald | 1986-01-21 |
| 4502956 | Filter assembly | Michael E. Wilson, Jr., David R. Olson, Robin B. MacDonald | 1985-03-05 |
| 4292179 | Spin-on filter coalescer unit with flow reversing baffle assembly | William G. Nostrand | 1981-09-29 |