Granted Patent
Utility
US 4,236,048 · App. 06/001,139
Electronic device for subtracting signals and associated system employing such device
Inventor:
Richard E. Olney
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: Jan 5, 1979
Inventor
Richard E. Olney
Assignee (at issue)
Fairchild Camera & Instrument Corp.
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.