Granted Patent
Utility
US 5,751,818 · App. 08/708,515
Circuit system for switching loudspeakers
Inventors:
Jonathan Gertz, Mark S. Butcher, James Tuomy
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Sep 5, 1996
Inventors
Jonathan Gertz
Mark S. Butcher
James Tuomy
Assignee (at issue)
Audio Authority 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.