Granted Patent
Utility
US 5,028,211 · App. 07/315,533
Torque coupling system
Inventors:
George S. Mordue, Herbert L. Ritchie, Jr.
Patented Case
View Patent ↗
Granted: Jul 2, 1991
Filed: Feb 24, 1989
Inventors
George S. Mordue
Herbert L. Ritchie, Jr.
Assignee (at issue)
Carborundum 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.