Granted Patent
Utility
US 4,280,077 · App. 05/904,778
Cathode-ray tube having corrugated shadow mask with varying waveform
Inventor:
Sigmund T. Villanyi
Patented Case
View Patent ↗
Granted: Jul 21, 1981
Filed: May 11, 1978
Inventor
Sigmund T. Villanyi
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.