Diaphragm for speaker, speaker using the diaphragm, and system using the speaker

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Mar 26, 2013
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Jul 8, 2010
app pub date
Jul 8, 2008
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Jul 13, 2007

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Abstract

A loudspeaker diaphragm contains polylactic acid, and bamboo charcoal mixed in the polylactic acid. The diaphragm does not affect environment and provides a loudspeaker with high sound quality.

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Patent Owner(s)

Patent Owner	Address
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD	OSAKA JAPAN OSAKA

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H04R:LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR ....

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Inventor Name	Address	# of filed Patents	Total Citations
Kajihara, Yoshimichi	Osaka, JP	23	163
Nishimura, Kazuaki	Mie, JP	52	461
Shinkoda, Hiroshi	Mie, JP	2	12

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Diaphragm for speaker, speaker using the diaphragm, and system using the speaker

Number of patents in Portfolio can not be more than 2000

United States of America Patent

12602017

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PATENT NO	8406452
APP PUB NO	20100172533A1
SERIAL NO	12602017
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
March 26, 2013	US,8406452,B2 US8406452B2	GRANTED PATENT AS SECOND PUBLICATION
July 08, 2010	US,20100172533,A1 US20100172533A1	FIRST PUBLISHED PATENT APPLICATION

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