Granted Patent
Utility
US 4,892,178 · App. 07/087,586
Viscous damper module for torsional vibration damping mechanism
Inventors:
Gerald D. Damon, Robert Mueller
Patented Case
View Patent ↗
Granted: Jan 9, 1990
Filed: Aug 20, 1987
Inventors
Gerald D. Damon
Robert Mueller
Assignee (at issue)
Eaton 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.