Granted Patent
Utility
US 5,043,738 · App. 07/494,012
Plural frequency patch antenna assembly
Inventors:
Sanford Shapiro, Robert A. Witte
Patented Case
View Patent ↗
Granted: Aug 27, 1991
Filed: Mar 15, 1990
Inventors
Sanford Shapiro
Robert A. Witte
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.