Granted Patent
Utility
US 4,525,846 · App. 06/453,165
Modem in-band secondary channel via radial modulation
Inventors:
Gordon Bremer, William L. Betts, Robert T. Greene
Patented Case
View Patent ↗
Granted: Jun 25, 1985
Filed: Dec 27, 1982
Inventors
Gordon Bremer
William L. Betts
Robert T. Greene
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.