Granted Patent
Utility
US 4,924,986 · App. 07/193,288
Viscous fluid clutches
Inventor:
Arthur E. H. Elmer
Patented Case
View Patent ↗
Granted: May 15, 1990
Filed: May 13, 1988
Inventor
Arthur E. H. Elmer
Assignee (at issue)
KYSOR INDUSTRIAL 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.