Granted Patent
Utility
US 5,640,423 · App. 08/168,590
Method for signal transmission using spectrally efficient orthogonal modulation
Inventor:
Teri L. Archer
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Dec 16, 1993
Inventor
Teri L. Archer
Assignee (at issue)
Signal Sciences 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.