Granted Patent
Utility
US 5,162,023 · App. 07/736,710
Viscous shear couplings and plates therefor
Inventor:
Georg Kwoka
Patented Case
View Patent ↗
Granted: Nov 10, 1992
Filed: Jul 26, 1991
Inventor
Georg Kwoka
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.