Granted Patent
Utility
US 6,570,472 · App. 09/605,908
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Inventor:
Erkki Niiranen
Patented Case
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Granted: May 27, 2003
Filed: Jun 28, 2000
Inventor
Erkki Niiranen
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.