Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421713 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Zhesheng Jiang, Raymond Collett, Bogdan Kozul | 2022-08-23 |
| 9926946 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Zhesheng Jiang, Raymond Collett, Bogdan Kozul | 2018-03-27 |
| 8827853 | Hydraulic power split engine with enhanced torque assist | Blake Carl, Hao Zhang | 2014-09-09 |
| 8596165 | Multiple gear motor drive | Joseph A. Kovach, Lisa K. Furches, Hao Zhang, Raymond Collett, Lori A. Martinelli | 2013-12-03 |
| 7569943 | Variable speed wind turbine drive and control system | Joesph A. Kovach, Norman C. Lindner, Bradley E. Nicol | 2009-08-04 |
| 5776516 | Two-platen injection molding machine | Manfred Armbruster, Robert Scott Betschman, Gerhard Schmidt | 1998-07-07 |