Granted Patent
Utility
US 4,694,490 · App. 06/317,510
Signal processing apparatus and methods
Inventors:
John Christopher Harvey, James W. Cuddihy
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: Nov 3, 1981
Inventors
John Christopher Harvey
James W. Cuddihy
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.