Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6468046 | Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump | Hongliu Du | 2002-10-22 |
| 6445990 | Method and apparatus for controlling straight line travel of a tracked machine | — | 2002-09-03 |
| 6374722 | Apparatus and method for controlling a discharge pressure of a variable displacement hydraulic pump | Hongliu Du | 2002-04-23 |
| 6375433 | Method and apparatus for controlling pump discharge pressure of a variable displacement hydraulic pump | Hongliu Du | 2002-04-23 |