Granted Patent
Utility
US 4,271,527 · App. 06/071,734
Double side band-quadrature carrier modulation signal structures
Inventor:
Thomas R. Armstrong
Patented Case
View Patent ↗
Granted: Jun 2, 1981
Filed: Aug 31, 1979
Inventor
Thomas R. Armstrong
Assignee (at issue)
PARADYNE 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.