Granted Patent
Utility
US 3,947,773 · App. 05/434,282
Channel number memory for television tuners
Inventor:
Don Edward Christensen
Patented Case
View Patent ↗
Granted: Mar 30, 1976
Filed: Jan 17, 1974
Inventor
Don Edward Christensen
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.