Granted Patent
Utility
US 4,383,597 · App. 06/219,227
Fluid shear coupling apparatus
Inventor:
Everett George Blair
Patented Case
View Patent ↗
Granted: May 17, 1983
Filed: Dec 22, 1980
Inventor
Everett George Blair
Assignee (at issue)
Wallace Murray Corporation
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.