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Brant James Callahan
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Nevada City, CA, US
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Patents Grants
last 30 patents
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Patent Grant
Acoustic driver assembly with restricted contact area
Patent number
7,218,034
Issue date
May 15, 2007
Impulse Devices, Inc.
Ross Alan Tessien
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Patents Applications
last 30 patents
Information
Patent Application
Acoustic driver assembly with increased head mass displacement ampl...
Publication number
20070103034
Publication date
May 10, 2007
Impulse Devices Inc.
Daniel A. Phillips
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information
Patent Application
Acoustic driver assembly with restricted contact area
Publication number
20060043834
Publication date
Mar 2, 2006
Impulse Devices Inc.
Ross Alan Tessien
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
Acoustic driver assembly with restricted contact area
Publication number
20060043835
Publication date
Mar 2, 2006
Impulse Devices Inc.
Ross Alan Tessien
G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information
Patent Application
Acoustic driver assembly with restricted contact area
Publication number
20060043840
Publication date
Mar 2, 2006
Impulse Devices Inc.
Ross Alan Tessien
G10 - MUSICAL INSTRUMENTS ACOUSTICS