Granted Patent
Utility
US 4,582,963 · App. 06/403,224
Echo cancelling using adaptive bulk delay and filter
Inventor:
Richard J. Danstrom
Patented Case
View Patent ↗
Granted: Apr 15, 1986
Filed: Jul 29, 1982
Inventor
Richard J. Danstrom
Assignee (at issue)
Rockwell International 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.