Granted Patent
Utility
US 4,418,944 · App. 06/233,360
Fluid coupling
Inventors:
Stephen W. Haines, Stephen Marshall, Mark E. Steen, Robert Carl Swanland
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Feb 11, 1981
Inventors
Stephen W. Haines
Stephen Marshall
Mark E. Steen
Robert Carl Swanland
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.