Granted Patent
Utility
US 4,437,327 · App. 06/337,199
Method and apparatus for circumferentially grooving thin-walled cylindrical metal objects
Inventor:
James A. Madden
Patented Case
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Granted: Mar 20, 1984
Filed: Jan 5, 1982
Inventor
James A. Madden
Assignee (at issue)
General Electric Company
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.