Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4953722 | Crane and lift enhancing beam attachment with moveable counterweight | Terry S. Casavant, P. Ralph Helm, Terry L. Petzold, Michael J. Wanek, Art G Zuehlke | 1990-09-04 |