Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4967544 | Automatic speed control system for a harvesting assembly | Duane Herbert Ziegler, Charles P. Barbaro, D. Keith Dewey, Steven L. Wildemuth, Frederick W. Nelson +1 more | 1990-11-06 |
| 4634855 | Photoelectric article sensor with facing reflectors | Vijay Manilal Dharia | 1987-01-06 |
| 4635215 | Article or seed counter | — | 1987-01-06 |
| 4281388 | Tachometer | David W. Gadtke, Duane Herbert Ziegler | 1981-07-28 |