Granted Patent
Utility
US 6,747,499 · App. 10/217,825
Tunable quadrature phase shifter using an all-pass circuit
Inventor:
Mihai A. Sanduleanu
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Aug 12, 2002
Inventor
Mihai A. Sanduleanu
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.