Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5271706 | Self-loading paper transport system | David J. Helbach, Perry J. Jewell | 1993-12-21 |
| 4599029 | Silage-tunneling apparatus | — | 1986-07-08 |
| 4445823 | Animal waste pumping system | — | 1984-05-01 |