Granted Patent
Utility
US 4,285,643 · App. 06/029,019
Rotary fluid pressure device
Inventor:
Harvey C. White
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Apr 12, 1979
Inventor
Harvey C. White
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.