Granted Patent
Utility
US 4,593,398 · App. 06/546,738
Adaptive differential PCM system with residual-driven adaptation of feedback predictor
Inventor:
Douglas James Millar
Patented Case
View Patent ↗
Granted: Jun 3, 1986
Filed: Oct 28, 1983
Inventor
Douglas James Millar
Assignee (at issue)
Nortel Networks Limited
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.