Granted Patent
Utility
US 4,648,761 · App. 06/797,768
Machining method
Inventors:
Robert N. Mitchell, James L. Hunt
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Nov 14, 1985
Inventors
Robert N. Mitchell
James L. Hunt
Assignee (at issue)
Kennematel, Inc.
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.