Granted Patent
Utility
US 5,874,921 · App. 08/717,462
Antenna impedance matching network requiring no switch contacts
Inventors:
Peter Doherty, Darrell G. Epperson
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Sep 20, 1996
Inventors
Peter Doherty
Darrell G. Epperson
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.