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Philippe Berthaud
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Tonnerre, FR
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Patents Grants
last 30 patents
Information
Patent Grant
Laser welded head drum for VCR
Patent number
6,961,220
Issue date
Nov 1, 2005
Thomson Licensing
Philippe Berthaud
G11 - INFORMATION STORAGE
Information
Patent Grant
Head drum with magnetic mounting of rotary transformer
Patent number
6,922,315
Issue date
Jul 26, 2005
THOMSON Licensing S.A.
Philippe Berthaud
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
Head drum with dynamic gap adjustment
Publication number
20040130829
Publication date
Jul 8, 2004
Philippe Berthaud
G11 - INFORMATION STORAGE
Information
Patent Application
Head drum with magnetic mounting of rotary transformer
Publication number
20040120080
Publication date
Jun 24, 2004
Philippe Berthaud
G11 - INFORMATION STORAGE
Information
Patent Application
Laser welding for drum base
Publication number
20020122277
Publication date
Sep 5, 2002
Philippe Berthaud
G11 - INFORMATION STORAGE