James M. Herd

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Hagerstown, MD, US

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Patents Grantslast 30 patents

Information 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

Patents Applicationslast 30 patents

Information Patent Application
Loudspeaker mounting system
- Publication number 20030123690
- Publication date Jul 3, 2003
- Matthew S. Polk,
- G06 - COMPUTING CALCULATING COUNTING