Granted Patent
Utility
US 4,645,989 · App. 06/581,513
Frequency switching circuit for multiple scan rate video display apparatus
Inventor:
Robert A. Barnes
Patented Case
View Patent ↗
Granted: Feb 24, 1987
Filed: Feb 21, 1984
Inventor
Robert A. Barnes
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.