Granted Patent
Utility
US 5,158,400 · App. 07/683,403
Rotary disc cutter and method of making same
Inventors:
Paul R. J. Skinner, Robert J. Ball
Patented Case
View Patent ↗
Granted: Oct 27, 1992
Filed: Apr 10, 1991
Inventors
Paul R. J. Skinner
Robert J. Ball
Assignee (at issue)
THE GLEASON WORKS
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.