Granted Patent
Utility
US 5,909,196 · App. 08/770,904
Dual frequency band quadrifilar helix antenna systems and methods
Inventor:
Gregory A. O'Neill, Jr.
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: Dec 20, 1996
Inventor
Gregory A. O'Neill, Jr.
Assignee (at issue)
ERICSSON GMBH
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.