Granted Patent
Utility
US 4,774,419 · App. 07/065,735
Transformer coupled drive circuit
Inventor:
Emilio F. D'Ariano
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Jun 24, 1987
Inventor
Emilio F. D'Ariano
Assignee (at issue)
General Electric Company
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.