Granted Patent
Utility
US 4,870,374 · App. 07/181,052
Modulator producing phase modulation by combining amplitude modulated signals
Inventor:
Mark A. Harris
Patented Case
View Patent ↗
Granted: Sep 26, 1989
Filed: Apr 13, 1988
Inventor
Mark A. Harris
Assignee (at issue)
E-Systems, Inc.
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.