Granted Patent
Utility
US 6,340,954 · App. 09/355,022
Dual-frequency helix antenna
Inventors:
Petteri Annamaa, Tero Kuittinen, Mika Bordi, Pertti Puurunen
Patented Case
View Patent ↗
Granted: Jan 22, 2002
Filed: Jul 26, 1999
Inventors
Petteri Annamaa
Tero Kuittinen
Mika Bordi
Pertti Puurunen
Assignee (at issue)
Filtronic LK Oy
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.