Granted Patent
Utility
US 6,178,248 · App. 08/840,159
Dual-processing interference cancelling system and method
Inventor:
Joseph Marash
Patented Case
View Patent ↗
Granted: Jan 23, 2001
Filed: Apr 14, 1997
Inventor
Joseph Marash
Assignee (at issue)
Andrea Electronics 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.