Granted Patent
Utility
US 4,719,787 · App. 06/901,569
Apparatus for forming a shadow mask
Inventor:
Frank R. Ragland, Jr.
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Aug 29, 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.