Granted Patent
Utility
US 4,724,436 · App. 06/909,692
Depolarizing radar corner reflector
Inventors:
Elmer L. Johansen, Albert Fromm
Patented Case
View Patent ↗
Granted: Feb 9, 1988
Filed: Sep 22, 1986
Inventors
Elmer L. Johansen
Albert Fromm
Assignee (at issue)
Environmental Research Institute
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.