Granted Patent
Utility
US 4,490,668 · App. 06/057,109
Microwave radiator utilizing solar energy
Inventor:
Fred Sterzer
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Jul 12, 1979
Inventor
Fred Sterzer
Assignee (at issue)
RCA Corporation
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.