Pengfei Ma

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Lisle, IL, US

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Patents Applicationslast 30 patents

Information Patent Application
Flow-control apparatus for controlling the swing speed of a boom as...
- Publication number 20050081518
- Publication date Apr 21, 2005
- Pengfei Ma
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information Patent Application
System for preventing swing wag for a work machine with a boom asse...
- Publication number 20050081519
- Publication date Apr 21, 2005
- Pengfei Ma
- E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING