Christopher Sean Beckett

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Saint Paul, MN, US

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Patents Grantslast 30 patents

Information Patent Grant
Multiple waveguide coaxial ceiling loudspeaker
- Patent number 7,142,680
- Issue date Nov 28, 2006
- Telex
- William James Gelow
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Multiple waveguide coaxial ceiling loudspeaker
- Publication number 20040190736
- Publication date Sep 30, 2004
- Telex Communications Inc.
- William James Gelow
- H04 - ELECTRIC COMMUNICATION TECHNIQUE