Granted Patent
Utility
US 4,320,373 · App. 06/207,720
Power transformer with high coupling coefficient
Inventor:
Walter R. Witte
Patented Case
View Patent ↗
Granted: Mar 16, 1982
Filed: Nov 17, 1980
Inventor
Walter R. Witte
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.