Granted Patent
Utility
US 4,720,701 · App. 06/815,823
System with enhanced signal detection and discrimination with saturable magnetic marker
Inventor:
George J. Lichtblau
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Jan 2, 1986
Inventor
George J. Lichtblau
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.