Granted Patent
Utility
US 5,311,151 · App. 07/982,375
I/Q modulator and demodulator having a single bridge
Inventor:
Risto Vaisanen
Patented Case
View Patent ↗
Granted: May 10, 1994
Filed: Nov 25, 1992
Inventor
Risto Vaisanen
Assignee (at issue)
Nokia Mobile Phones Ltd.
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.