Granted Patent
Utility
US 4,416,445 · App. 06/214,771
Viscous spring damper
Inventor:
L. Dale Coad
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Dec 9, 1980
Inventor
L. Dale Coad
Assignee (at issue)
Imperial Clevite Inc.
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.