Granted Patent
Utility
US 4,121,257 · App. 05/772,998
Cathode-ray tube with double tension band
Inventor:
Varahur Ramaswamy Krishnamurthy
Patented Case
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Granted: Oct 17, 1978
Filed: Feb 28, 1977
Inventor
Varahur Ramaswamy Krishnamurthy
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.