Granted Patent
Utility
US 4,909,292 · App. 07/325,526
Boring, mortising, tenoning and duplicating woodworking machine
Inventor:
John Wirth, Jr.
Patented Case
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Granted: Mar 20, 1990
Filed: Mar 20, 1989
Inventor
John Wirth, Jr.
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.