Granted Patent
Utility
US 4,933,680 · App. 07/250,877
Microstrip antenna system with multiple frequency elements
Inventors:
Sanford Shapiro, Clinton W. Pederson
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Sep 29, 1988
Inventors
Sanford Shapiro
Clinton W. Pederson
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.