Granted Patent
Utility
US 5,022,421 · App. 07/471,229
Fluid connection method and assembly
Inventor:
Dwight N. Johnson
Patented Case
View Patent ↗
Granted: Jun 11, 1991
Filed: Jan 26, 1990
Inventor
Dwight N. Johnson
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.