Granted Patent
Utility
US 4,292,672 · App. 06/021,822
Inspection system for detecting defects in regular patterns
Inventor:
Peter D. Southgate
Patented Case
View Patent ↗
Granted: Sep 29, 1981
Filed: Mar 19, 1979
Inventor
Peter D. Southgate
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.