Granted Patent
Utility
US 4,736,170 · App. 07/047,941
Unbalanced quarternary PSK modulator using unbalanced quadrature coupler
Inventors:
You-Sun Wu, Donald E. Aubert
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: May 8, 1987
Inventors
You-Sun Wu
Donald E. Aubert
Assignee (at issue)
RCA Corporation
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.