Granted Patent
Utility
US 4,667,151 · App. 06/679,322
Calibrated radio frequency sweep
Inventor:
Rex J. Crookshanks
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Dec 7, 1984
Inventor
Rex J. Crookshanks
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.