Granted Patent
Utility
US 4,641,190 · App. 06/733,215
Muting system
Inventors:
William John Testin, Juri Tults
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: May 10, 1985
Inventors
William John Testin
Juri Tults
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.