Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421713 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Richard D. Kimpel, Raymond Collett, Bogdan Kozul | 2022-08-23 |
| 10819252 | Adaptive hybrid wireless power generation using piezoelectric element and power beaming in hydraulic systems | Jeff Cullman, Hao Zhang, James Howland, Nicholas N. White | 2020-10-27 |
| 10160439 | Power efficiency control mechanism for a working machine | Hao Zhang, Raymond Collett, Blake Carl | 2018-12-25 |
| 9926946 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Richard D. Kimpel, Raymond Collett, Bogdan Kozul | 2018-03-27 |