Granted Patent
Utility
US 4,638,320 · App. 06/439,458
Direction finding interferometer
Inventors:
Dennis J. Eggert, Charles E. Hendrix, Barnet Krinsky
Patented Case
View Patent ↗
Granted: Jan 20, 1987
Filed: Nov 5, 1982
Inventors
Dennis J. Eggert
Charles E. Hendrix
Barnet Krinsky
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.