Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4851818 | Electronic controller for a water purifying unit | Barry M. Brown, William T. Fearnside, Henry L. West | 1989-07-25 |
| 4824564 | Dry sump liquid filter | James T. Greene, Richard Mayo | 1989-04-25 |