Granted Patent
Utility
US 5,142,291 · App. 07/563,129
Passive microwave near-field tomographic imaging system and method
Inventors:
Donald C. D. Chang, Joseph G. Gurley, Frank A. Hagen, Samuel C. Reynolds, Kar W. Yung
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Aug 3, 1990
Inventors
Donald C. D. Chang
Joseph G. Gurley
Frank A. Hagen
Samuel C. Reynolds
Kar W. Yung
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.