Granted Patent
Utility
US 4,661,851 · App. 06/593,967
Apparatus for reducing the effect of noise interference in audio companding system
Inventor:
Max Ward Muterspaugh
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Mar 27, 1984
Inventor
Max Ward Muterspaugh
Assignee (at issue)
RCA 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.