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Hiroyuki Tomiyama
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Yamagata, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Magnesium diaphragm, method of manufacturing the same, and speaker...
Patent number
7,454,032
Issue date
Nov 18, 2008
Pioneer Corporation
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Method of manufacturing a magnesium diaphragm
Patent number
7,308,750
Issue date
Dec 18, 2007
Pioneer Corporation
Hiroyuki Tomiyama
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information
Patent Grant
Speaker damper
Patent number
7,006,652
Issue date
Feb 28, 2006
Pioneer Corporation
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Electrically conductive damper device for speaker
Patent number
6,814,181
Issue date
Nov 9, 2004
Pioneer Corporation
Yasuhisa Abe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Damper for speaker and method of producing the same
Patent number
6,772,855
Issue date
Aug 10, 2004
Pioneer Corporation
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Patents Applications
last 30 patents
Information
Patent Application
SPEAKER DAMPER AND SPEAKER DEVICE
Publication number
20120106777
Publication date
May 3, 2012
Tohoku Pioneer Corporation
Kenta Fujimoto
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Speaker device
Publication number
20070286447
Publication date
Dec 13, 2007
Pioneer Corporation
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Speaker diaphragm and method of fabricating the same
Publication number
20050273997
Publication date
Dec 15, 2005
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Speaker device and method of manufacturing the speaker device
Publication number
20050271240
Publication date
Dec 8, 2005
PIONEER CORPORATION
Seiya Sato
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Bobbin integrated type magnesium diaphragm, manufacturing method th...
Publication number
20050257999
Publication date
Nov 24, 2005
Pioneer Corporation
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Vibrating plate for speaker and method of fabricating the same
Publication number
20050226459
Publication date
Oct 13, 2005
PIONEER CORPORATION
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Magnesium diaphragm, method of manufacturing the same, and speaker...
Publication number
20050041828
Publication date
Feb 24, 2005
Pioneer Corporation
Hiroyuki Tomiyama
C25 - ELECTROLYTIC OR ELECTROPHORETIC PROCESSES APPARATUS THEREFOR
Information
Patent Application
Magnesium diaphragm, method for manufacturing the same, and speaker...
Publication number
20040231136
Publication date
Nov 25, 2004
PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
Hiroyuki Tomiyama
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Application
Speaker damper
Publication number
20020181731
Publication date
Dec 5, 2002
PIONEER CORPORATION
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Electrically conductive damper device for speaker
Publication number
20020112914
Publication date
Aug 22, 2002
PIONEER CORPORATION
Yasuhisa Abe
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Application
Damper for speaker and method of producing the same
Publication number
20020043424
Publication date
Apr 18, 2002
PIONEER CORPORATION
Hiroyuki Tomiyama
H04 - ELECTRIC COMMUNICATION TECHNIQUE