Granted Patent
Utility
US 6,476,672 · App. 09/864,144
Four phase level shift circuit for use in a push-pull amplifier
Inventor:
Marco Berkhout
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: May 24, 2001
Inventor
Marco Berkhout
Assignee (at issue)
KONINKLIJKE PHILIPS ELECTRONICS NV
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.