Granted Patent
Utility
US 6,743,003 · App. 10/426,079
Hydraulic device with balanced rotor
Inventor:
Xingen Dong
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Apr 29, 2003
Inventor
Xingen Dong
Assignee (at issue)
Parker-Hannifin Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.