Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D304224 | Flow control valve for lawn sprinkler | Dennis A. Wilson, Mark S. Williamsen | 1989-10-24 |
| 4807664 | Programmable flow control valve unit | Dennis A. Wilson, Mark S. Williamsen | 1989-02-28 |
| 4797820 | Programmable flow control valve unit with clock, program, automatic, manual, and repeat modes | Dennis A. Wilson, Mark S. Williamsen | 1989-01-10 |