Granted Patent
Utility
US 4,422,074 · App. 04/458,971
Signal skimming system
Inventors:
Barry E. Williams, Norol T. Evans, John A. Propster
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: May 26, 1965
Inventors
Barry E. Williams
Norol T. Evans
John A. Propster
Assignee (at issue)
Hughes Aircraft Company
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.