Granted Patent
Utility
US 5,451,973 · App. 08/146,556
Multi-mode dual circularly polarized spiral antenna
Inventors:
Carlton H. Walter, Donn V. Campbell
Patented Case
View Patent ↗
Granted: Sep 19, 1995
Filed: Nov 2, 1993
Inventors
Carlton H. Walter
Donn V. Campbell
Assignee (at issue)
TRW Limited
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.