Issued Patents All Time
Showing 1–22 of 22 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10358770 | Method for making suspension cable to desired length | Jeff A. Jensen, Christopher R. Wanasek, Jeffrey Ryan Asman, Randy Tyler Ross, James Leigh Gill +3 more | 2019-07-23 |
| 9702250 | Power shovel hoist machinery with auxiliary weight box | Frank R. Szpek, Jr., David T. Bienfang | 2017-07-11 |
| 9506219 | Support rail and swing gear assembly for a mining vehicle | David T. Bienfang, Gurbachan S. Bumraw, Philip R. Strydom, Christopher R. Wanasek, Jeanne Yaunke | 2016-11-29 |
| 9394944 | Thrust rail and swing gear assembly for a mining vehicle | David T. Bienfang, Gurbachan S. Bumraw, Philip R. Strydom, Christopher R. Wanasek, Jeanne Yaunke | 2016-07-19 |
| 9388689 | Multi-deck mining vehicle | David T. Bienfang, Frank R. Szpek, Jr. | 2016-07-12 |
| 9127435 | Power shovel hoist machinery with auxiliary weight box | David T. Bienfang, Frank R. Szpek, Jr. | 2015-09-08 |
| 9109612 | Sealed hydraulic tank system for mining shovel | Robert Weber, Perry DeCuir | 2015-08-18 |
| 9096992 | Dipper door assembly | Richard Hoppens, Jeffrey Klingel, Douglas Maki, Zoran Marjanovic, Kenneth J. Meyer | 2015-08-04 |
| 8997382 | Dipper door assembly | Jeffrey Klingel, Kenneth J. Meyer, Zoran Marjanovic, Richard Hoppens, Jamie K. Sherwood +2 more | 2015-04-07 |
| 8992157 | Hydraulic cylinder with guide bushing for a sliding dipper handle of a power shovel | — | 2015-03-31 |
| 8991080 | Dipper door assembly | Jeffrey Klingel, Douglas Maki, Kenneth J. Meyer, Russell J. Willmann | 2015-03-31 |
| 8966792 | Machine having dipper actuator system | David T. Bienfang, Frank R. Szpek, Jr. | 2015-03-03 |
| 8959805 | Machine having dipper actuator system | David T. Bienfang, Frank R. Szpek, Jr. | 2015-02-24 |
| 8920104 | Hydraulic crowd system for electric mining shovel | Robert Weber, Perry DeCuir | 2014-12-30 |
| 7174826 | Hydraulic crowd control mechanism for a mining shovel | Timothy Robert Kerrigan, Matthew Brueck, Jeanne Yaunke, Michael W. Haws, Michael G. Onsager | 2007-02-13 |
| 7096610 | Dipper assembly including a closure mechanism | — | 2006-08-29 |
| 7024805 | Dragline excavating machine with direct drive hoist and drag drums | Michael G. Onsager, Walter Koellner | 2006-04-11 |
| 6752282 | Swing drive assembly | Robert F. Brown, Gregory N. Feld | 2004-06-22 |
| 5956915 | Tubular drill mast | James P. Piper, Kenneth Hammel, Frank R. Szpek, Jr. | 1999-09-28 |
| 5931238 | Apparatus for storing and handling drill pipe | Calvin E. Stuckemeyer | 1999-08-03 |
| 4718729 | Material clearing and piling device | Melvin W. Kraschnewski | 1988-01-12 |
| 4702524 | Continuous mining machine | Phillip Wade Mork, Melvin W. Kraschnewski | 1987-10-27 |