Granted Patent
Utility
US 4,354,305 · App. 06/094,545
Contouring and threading attachment for multi-function machine tools
Inventors:
Harvey R. Plummer, William E. Keller
Patented Case
View Patent ↗
Granted: Oct 19, 1982
Filed: Nov 15, 1979
Inventors
Harvey R. Plummer
William E. Keller
Assignee (at issue)
Giddings & Lewis, 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.