Granted Patent
Utility
US 4,333,133 · App. 06/189,470
Power source with an electronic impedance changer
Inventor:
Joseph Pernyeszi
Patented Case
View Patent ↗
Granted: Jun 1, 1982
Filed: Sep 22, 1980
Inventor
Joseph Pernyeszi
Assignee (at issue)
International Telephone and Telegraph 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.