Granted Patent
Utility
US 4,445,002 · App. 06/335,144
Sidetone circuit
Inventor:
Michael B. Terry
Patented Case
View Patent ↗
Granted: Apr 24, 1984
Filed: Dec 28, 1981
Inventor
Michael B. Terry
Assignee (at issue)
Mostek 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.