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Patent applications and USPTO patent grants for Kimpel; Richard D..The latest application filed is for "hydraulic hybrid swing drive system for excavators".
Patent | Date |
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Hydraulic hybrid swing drive system for excavators Grant 11,421,713 - Cullman , et al. August 23, 2 | 2022-08-23 |
Hydraulic Hybrid Swing Drive System For Excavators App 20180209449 - Cullman; Jeff ;   et al. | 2018-07-26 |
Hydraulic hybrid swing drive system for excavators Grant 9,926,946 - Cullman , et al. March 27, 2 | 2018-03-27 |
Hydraulic Hybrid Swing Drive System For Excavators App 20140373522 - Cullman; Jeff ;   et al. | 2014-12-25 |
Multiple gear motor drive Grant 8,596,165 - Kovach , et al. December 3, 2 | 2013-12-03 |
Variable speed wind turbine drive and control system Grant 7,569,943 - Kovach , et al. August 4, 2 | 2009-08-04 |
Variable Speed Wind Turbine Drive And Control System App 20080296897 - Kovach; Joesph A. ;   et al. | 2008-12-04 |
Multiple Gear Motor Drive App 20080113838 - Kovach; Joseph A. ;   et al. | 2008-05-15 |
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