Granted Patent
Utility
US 4,540,892 · App. 06/563,608
Multiple input voltage power controller
Inventor:
John Carvalho
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Dec 20, 1983
Inventor
John Carvalho
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.