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

Patent Owner(s)

Patent Owner	Address
RHK TECHNOLOGY INC	1050 EAST MAPLE ROAD TROY MI 48083

International Classification(s)

• H03L:AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR S....
• B82Y:SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; ....
• G01Q:SCANNING-PROBE TECHNIQUES OR APPARATUS; APPLICATIO....
• G01R:MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC V....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Porthun, Steffen	Teltow, DE	3	7

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jun 16, 2026

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 11.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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
December 16, 2014	US,8914909,B2   US8914909B2	GRANTED PATENT AS SECOND PUBLICATION
January 03, 2013	US,20130007929,A1   US20130007929A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 8914909

Frequency measuring and control apparatus with integrated parallel synchronized oscillators

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