Granted Patent
Utility
US 5,101,951 · App. 07/661,701
Viscous coupling with plastic housing or hub with metallic retaining parts
Inventors:
Helmut Wiese, Paul-Erich Schonenbrucher
Patented Case
View Patent ↗
Granted: Apr 7, 1992
Filed: Feb 27, 1991
Inventors
Helmut Wiese
Paul-Erich Schonenbrucher
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.