Granted Patent
Utility
US 6,621,337 · App. 10/016,284
Power-efficient amplifier circuit and process for power-efficient amplification of a signal
Inventor:
Martin Gröpl
Patented Case
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Granted: Sep 16, 2003
Filed: Oct 30, 2001
Inventor
Martin Gröpl
Assignee (at issue)
XIGNAL TECHNOLOGIES AG
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.