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Mark S. Butcher

AA Audio Authority: 1 patents #8 of 9Top 90%
Overall (All Time): #3,683,975 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
5751818 Circuit system for switching loudspeakers Jonathan Gertz, James Tuomy 1998-05-12