Granted Patent
Utility
US 4,903,033 · App. 07/176,581
Planar dual polarization antenna
Inventors:
Chich-Hsing A. Tsao, Yeongming Hwang, Francis J. Kilburg, Fred J. Dietrich
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Apr 1, 1988
Inventors
Chich-Hsing A. Tsao
Yeongming Hwang
Francis J. Kilburg
Fred J. Dietrich
Assignee (at issue)
Ford Aerospace 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.