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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address
SIGMATEL LLC	1601 S MOPAC EXPRESSWAY SUITE 1OO AUSTIN TX 78735

International Classification(s)

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

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Felder, Matthew D	Austin, US	45	484
Henson, Matthew Brady	Austin, US	20	246

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
January 25, 2011	US,7876911,B2   US7876911B2	GRANTED PATENT AS SECOND PUBLICATION
September 27, 2007	US,20070223718,A1   US20070223718A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7876911

Headphone driver and methods for use therewith

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