Granted Patent
Utility
US 4,368,541 · App. 06/164,684
Multiplexing arrangement for a plurality of voltage controlled filters
Inventor:
Robert M. Evans
Patented Case
View Patent ↗
Granted: Jan 11, 1983
Filed: Jun 30, 1980
Inventor
Robert M. Evans
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.