Granted Patent
Utility
US 4,642,646 · App. 06/619,808
Automatic sensitivity adjustment and audio muting for aircraft marker beacon receiver
Inventor:
Noel A. Rogers
Patented Case
View Patent ↗
Granted: Feb 10, 1987
Filed: Jun 12, 1984
Inventor
Noel A. Rogers
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.