Granted Patent
Utility
US 4,145,639 · App. 05/846,196
Television receiver protection circuit
Inventor:
Donald H. Willis
Patented Case
View Patent ↗
Granted: Mar 20, 1979
Filed: Oct 27, 1977
Inventor
Donald H. Willis
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.