Granted Patent
Utility
US 4,972,440 · App. 07/248,446
Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals
Inventors:
Gregory Ernst, Daniel Fraley
Patented Case
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Granted: Nov 20, 1990
Filed: Sep 23, 1988
Inventors
Gregory Ernst
Daniel Fraley
Assignee (at issue)
Hughes Aircraft Company
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.