Granted Patent
Utility
US 4,560,150 · App. 06/554,905
Dry viscous spring strut
Inventor:
Emile M. Shtarkman
Patented Case
View Patent ↗
Granted: Dec 24, 1985
Filed: Nov 25, 1983
Inventor
Emile M. Shtarkman
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.