Granted Patent
Utility
US 4,404,429 · App. 06/261,362
Matching volume control characteristics for two channels
Inventor:
Patrick D. Griffis
Patented Case
View Patent ↗
Granted: Sep 13, 1983
Filed: May 7, 1981
Inventor
Patrick D. Griffis
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.