Granted Patent
Utility
US 4,690,661 · App. 06/769,237
Torsional stress distribution flexible coupling
Inventors:
Walter A. Fredericks, Edward W. McCullough
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Aug 26, 1985
Inventors
Walter A. Fredericks
Edward W. McCullough
Assignee (at issue)
REXNORD GMBH
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.