Granted Patent
Utility
US 4,323,755 · App. 06/077,915
Method of making a machine-readable marking in a workpiece
Inventor:
Morton J. Nierenberg
Patented Case
View Patent ↗
Granted: Apr 6, 1982
Filed: Sep 24, 1979
Inventor
Morton J. Nierenberg
Assignee (at issue)
RCA Corporation
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.