Granted Patent
Utility
US 4,138,628 · App. 05/819,095
Magnetizing method for use with a cathode ray tube
Inventor:
Joseph L. Smith, Jr.
Patented Case
View Patent ↗
Granted: Feb 6, 1979
Filed: Jul 26, 1977
Inventor
Joseph L. Smith, Jr.
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.