Granted Patent
Utility
US 4,568,313 · App. 06/497,405
Protective guard for articulated shafting
Inventors:
Harold R. Diffenderfer, George S. Rowley
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: May 23, 1983
Inventors
Harold R. Diffenderfer
George S. Rowley
Assignee (at issue)
Neapco Holdings LLC
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.