Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9121425 | Connection system for crane components | Robert J. Walker, Nathan P. Holly | 2015-09-01 |
| 8839966 | Folding jib main strut and transportable reeved strut caps | Robert J. Walker | 2014-09-23 |
| 8397924 | Drum frame system for cranes | — | 2013-03-19 |
| 5842587 | Offsetting link assembly for folding luffing jib | Robert J. Walker, Daniel L. Krajnik | 1998-12-01 |
| 5649635 | Easily removable sheave assembly | Terry S. Casavant, Paul M. Pukita | 1997-07-22 |
| 5487479 | Method for nesting longitudinally divisible crane boom segments | David J. Pech, Robert J. Walker | 1996-01-30 |
| 5406767 | Longitudinally divisible crane boom segment | David J. Pech, Robert J. Walker | 1995-04-18 |
| 5292016 | Luffing jib backstop assembly | Terry S. Casavant | 1994-03-08 |
| 5199586 | Quick-connect sectional boom members for cranes and the like | David J. Pech, Wayne W. Beebe, Terry S. Casavant, John M. Lanning, Paul M. Pukita | 1993-04-06 |
| 4953722 | Crane and lift enhancing beam attachment with moveable counterweight | Thomas K. Becker, Terry S. Casavant, P. Ralph Helm, Terry L. Petzold, Art G Zuehlke | 1990-09-04 |