Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4646687 | Animal waterer | Gerald L. Knief | 1987-03-03 |
| 4633815 | Waterer corner wear guard | Gerald L. Knief | 1987-01-06 |
| 4248177 | Animal waterer with recirculating water system | Gerald L. Knief | 1981-02-03 |
| D257691 | Animal waterer | Gerald L. Knief | 1980-12-23 |
| 4185589 | Method and apparatus for heating a nipple valve livestock waterer | Gerald L. Knief | 1980-01-29 |