US Patent 7925040 Speaker
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Patent abstract
A speaker may include a center pole and a voice coil bobbin having a bobbin that may include nonmagnetic and electric conductor layers and insulator layers disposed between the electric conductor layers. An electrostatic capacity, which is formed between the center pole and the voice coil bobbin, is detected and outputted as an electrical signal.
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Patent Inventor Names
Akinori Ushikoshi0
Hideo Kitazawa0
Kenji Yokoyama0
Takamasa Kaneko0
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US Patent 07925040 Speaker US Patent 7925040 Speaker
Infobox
Patent Number
07925040
Patent Number
7925040
Edits on 19 Jun, 2022
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US Patent 07925040 Speaker
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Is a
Patent jurisdiction
Patent number
07925040
Date of patent
April 12, 2011
Patent application number
11447321
Date Filed
June 6, 2006
Patent primary examiner
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