Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11421713 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett | 2022-08-23 |
| 9926946 | Hydraulic hybrid swing drive system for excavators | Jeff Cullman, Hao Zhang, Richard D. Kimpel, Zhesheng Jiang, Raymond Collett | 2018-03-27 |