US Patent 7953240 Loudspeaker apparatus
Patent 7953240 was granted and assigned to Panasonic on May, 2011 by the United States Patent and Trademark Office.
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Patent abstract
A loudspeaker apparatus comprises a housing, an adsorptive material provided inside the housing, for physically adsorbing gas inside the housing, a vibration section including a diaphragm and provided in an opening formed in the housing, a drive section for driving the diaphragm to generate sound from the diaphragm, and a negative stiffness generating mechanism provided inside the housing, for reducing an acoustic stiffness inside the housing, the acoustic stiffness acting on the diaphragm.
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US Patent 07953240 Loudspeaker apparatus US Patent 7953240 Loudspeaker apparatus
Infobox
Patent Number
0795324000
Patent Number
795324000
Edits on 7 Apr, 2023
Golden AI
Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079532400
Date of Patent
May 31, 2011
0Patent Application Number
114376650
Date Filed
May 22, 2006
0Patent Primary Examiner
Edits on 24 Sep, 2022
Golden AI
Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
079532400
Date of Patent
May 31, 2011
0Patent Application Number
114376650
Date Filed
May 22, 2006
0Patent Primary Examiner
Edits on 7 Dec, 2021
Golden AI
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US Patent 07953240 Loudspeaker apparatus
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07953240
Date of patent
May 31, 2011
Patent application number
11437665
Date Filed
May 22, 2006
Patent primary examiner
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