Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11208303 | Lift crane with improved movable counterweight | David J. Pech, Joseph R. Rucinski, Joel D. Zick, Charles E. Wernecke | 2021-12-28 |
| 10647555 | Lift crane with improved movable counterweight | David J. Pech, Joseph R. Rucinski, Joel D. Zick, Charles E. Wernecke | 2020-05-12 |
| 10179722 | Lift crane with improved movable counterweight | David J. Pech, Joseph R. Rucinski, Joel D. Zick, Charles E. Wernecke | 2019-01-15 |
| 9815674 | Pin puller for crane connections | Kenneth J. Porubcansky | 2017-11-14 |
| 8348073 | Carbody connection system and crane using same | David J. Pech | 2013-01-08 |
| 7997432 | Trunnion transportation system and crane using same | Kenneth J. Porubcansky | 2011-08-16 |