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Austin, TX, US
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Patents Grants
last 30 patents
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Patent Grant
Use of constant force spring in keyboard assembly
Patent number
7,678,989
Issue date
Mar 16, 2010
Magnekey
Van S. Chandler
G10 - MUSICAL INSTRUMENTS ACOUSTICS
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Patents Applications
last 30 patents
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Patent Application
Use of constant force spring in keyboard assembly
Publication number
20080098878
Publication date
May 1, 2008
MagneKey
Van S. Chandler
G10 - MUSICAL INSTRUMENTS ACOUSTICS