Granted Patent
Utility
US 6,556,683 · App. 09/226,474
Remote turn-on circuit for automobile audio amplifier
Inventor:
John E. Levreault
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Jan 7, 1999
Inventor
John E. Levreault
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.