Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4246847 | Bumper assisted for cart accumulator | David E. Hiland, Erwin B. Knies | 1981-01-27 |
| 4211172 | Apparatus for connecting tow carts to a conveyor | David E. Hiland, Erwin B. Knies, Robert E. Oberlin | 1980-07-08 |