Granted Patent
Utility
US 4,645,968 · App. 06/867,618
Vibration control of color picture tube shadow mask
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: May 27, 1986
Inventor
Frank R. Ragland, 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.