Granted Patent
Utility
US 5,500,892 · App. 08/195,267
Echo canceller
Inventor:
Daniel L. Essig
Patented Case
View Patent ↗
Granted: Mar 19, 1996
Filed: Feb 14, 1994
Inventor
Daniel L. Essig
Assignee (at issue)
Brooktree 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.