Granted Patent
Utility
US 5,191,915 · App. 07/717,611
Viscous fluid shear clutches and control valves therefor
Inventor:
Arthur E. H. Elmer
Patented Case
View Patent ↗
Granted: Mar 9, 1993
Filed: Jun 19, 1991
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.