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James M. Herd
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Hagerstown, MD, US
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last 30 patents
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Patent Grant
Loudspeaker mounting system
Patent number
6,721,434
Issue date
Apr 13, 2004
Britannia Investment Corporation
Matthew S. Polk
G06 - COMPUTING CALCULATING COUNTING
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last 30 patents
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Patent Application
Loudspeaker mounting system
Publication number
20030123690
Publication date
Jul 3, 2003
Matthew S. Polk,
G06 - COMPUTING CALCULATING COUNTING