Granted Patent
Utility
US 5,241,321 · App. 07/884,512
Dual frequency circularly polarized microwave antenna
Inventor:
Chich-Hsing A. Tsao
Patented Case
View Patent ↗
Granted: Aug 31, 1993
Filed: May 15, 1992
Inventor
Chich-Hsing A. Tsao
Assignee (at issue)
Space Systems/Loral, LLC
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.