Granted Patent
Utility
US 4,697,261 · App. 06/904,551
Linear predictive echo canceller integrated with RELP vocoder
Inventors:
David Wang, Philip J. Wilson
Patented Case
View Patent ↗
Granted: Sep 29, 1987
Filed: Sep 5, 1986
Inventors
David Wang
Philip J. Wilson
Assignee (at issue)
M/A-COM Government Systems, Inc.
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.