Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7967158 | Mobile lift crane with variable position counterweight | David J. Pech, Kenneth J. Porubcansky, John M. Lanning | 2011-06-28 |
| 7946560 | Crane hook block | Lambert Drent, Dirk Albert Stamhuis, William J. O'Neil | 2011-05-24 |