Granted Patent
Utility
US 4,909,367 · App. 07/140,990
Automatic thermal and speed controls for viscous fluid clutches
Inventor:
Arthur E. H. Elmer
Patented Case
View Patent ↗
Granted: Mar 20, 1990
Filed: Jan 5, 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.