Granted Patent
Utility
US 4,862,464 · App. 07/139,449
Data error detector for digital modems using trellis coding
Inventors:
William L. Betts, Edward S. Zuranski
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Dec 30, 1987
Inventors
William L. Betts
Edward S. Zuranski
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.