Granted Patent
Utility
US 4,331,978 · App. 06/212,371
Voltage regulator/active filter for television receiver
Inventor:
Philip J. Nowaczyk
Patented Case
View Patent ↗
Granted: May 25, 1982
Filed: Dec 3, 1980
Inventor
Philip J. Nowaczyk
Assignee (at issue)
Zenith Radio 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.