Granted Patent
Utility
US 4,588,424 · App. 06/661,398
Fluid pumping system
Inventors:
Rodney T. Heath, Charles R. Gerlach
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Oct 16, 1984
Inventors
Rodney T. Heath
Charles R. Gerlach
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.