Membership
Tour
Register
Log in
Mark S. Butcher
Follow
Person
Paris, KY, US
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Circuit system for switching loudspeakers
Patent number
5,751,818
Issue date
May 12, 1998
Audio Authority Corporation
Jonathan Gertz
H04 - ELECTRIC COMMUNICATION TECHNIQUE