Granted Patent
Utility
US 4,982,808 · App. 07/455,850
Viscous shear coupling
Inventors:
Herbert Taureg, Heinz Klein
Patented Case
View Patent ↗
Granted: Jan 8, 1991
Filed: Dec 19, 1989
Inventors
Herbert Taureg
Heinz Klein
Assignee (at issue)
Viscodrive GmbH
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.