Granted Patent
Utility
US 4,281,272 · App. 06/113,902
High voltage switching power supply for penetration cathode ray displays
Inventor:
Thomas W. Spilsbury
Patented Case
View Patent ↗
Granted: Jul 28, 1981
Filed: Jan 21, 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.