Granted Patent
Utility
US 5,920,292 · App. 08/770,399
L-band quadrifilar helix antenna
Inventor:
Gregory A. O'Neill, Jr.
Patented Case
View Patent ↗
Granted: Jul 6, 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.