Granted Patent
Utility
US 6,065,433 · App. 08/973,472
Variable displacement metering pump
Inventor:
Raymond Hill
Patented Case
View Patent ↗
Granted: May 23, 2000
Filed: Dec 16, 1997
Inventor
Raymond Hill
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.