Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10024341 | Hydraulic hybrid swing drive system for excavators | Hao Zhang, Jeff Cullman, Raymond Collett, Nick White, Patrick Stegemann | 2018-07-17 |
| 9879403 | Hydraulic hybrid swing drive system for excavators | Nicholas N. White, Hao Zhang | 2018-01-30 |