Issued Patents All Time
Showing 1–25 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12187587 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2025-01-07 |
| 11884522 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2024-01-30 |
| 11261064 | Lift crane with moveable counterweight | Joseph R. Rucinski | 2022-03-01 |
| 11208303 | Lift crane with improved movable counterweight | Joseph R. Rucinski, Joel D. Zick, Bronson E. Foust, Charles E. Wernecke | 2021-12-28 |
| 10865079 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2020-12-15 |
| 10647555 | Lift crane with improved movable counterweight | Joseph R. Rucinski, Joel D. Zick, Bronson E. Foust, Charles E. Wernecke | 2020-05-12 |
| 10457530 | Lift crane with moveable counterweight | Joseph R. Rucinski | 2019-10-29 |
| 10336589 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2019-07-02 |
| 10179722 | Lift crane with improved movable counterweight | Joseph R. Rucinski, Joel D. Zick, Bronson E. Foust, Charles E. Wernecke | 2019-01-15 |
| 9278834 | Lift crane with moveable counterweight | Joseph R. Rucinski | 2016-03-08 |
| 9132999 | Method of connecting crane suspension assembly sections together and frame mounted assembly used therefore | Robert J. Walker, William J. O'Neil | 2015-09-15 |
| 9051159 | Column connector system | Robert J. Walker | 2015-06-09 |
| 8985353 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2015-03-24 |
| 8827092 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2014-09-09 |
| 8684197 | Crane with boom raising assist structure | Joseph R. Rucinski | 2014-04-01 |
| 8511489 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky, John M. Lanning | 2013-08-20 |
| 8414091 | Track tensioning system for mobile vehicles, including lift cranes | Joel D. Zick, Kenneth J. Porubcansky | 2013-04-09 |
| 8348073 | Carbody connection system and crane using same | Bronson E. Foust | 2013-01-08 |
| 8075069 | Drive tumbler and track drive for mobile vehicles, including lift cranes | Joel D. Zick | 2011-12-13 |
| 7967158 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky, Alan E. Pleuss, John M. Lanning | 2011-06-28 |
| 7766176 | Mobile lift crane with lift enhancing attachment | — | 2010-08-03 |
| 7546928 | Mobile lift crane with variable position counterweight | Kenneth J. Porubcansky | 2009-06-16 |
| 6758356 | Liftcrane with synchronous rope operation | Arthur G. Zuehlke | 2004-07-06 |
| 6588521 | Four track crawler crane | Kenneth J. Porubcansky, Alan E. Pleuss | 2003-07-08 |
| 6481202 | Hydraulic system for boom hoist cylinder crane | Arthur G. Zuehlke, Charles R. Wernecke | 2002-11-19 |