Granted Patent
Utility
US 4,297,621 · App. 06/193,236
Cathode ray tube beam deflection amplifier system
Inventor:
Thomas W. Spilsbury
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Oct 2, 1980
Inventor
Thomas W. Spilsbury
Assignee (at issue)
Sperry Corp.
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.