Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D446999 | Control element | William John Teller | 2001-08-28 |
| D432861 | Control element | William John Teller | 2000-10-31 |
| 5287993 | Hopper agitator | David F. Ford | 1994-02-22 |
| 5277337 | Hopper agitator | David F. Ford | 1994-01-11 |