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

Patent Owner(s)

Patent Owner	Address
TETRA TECH INC	3475 E FOOTHILL BLVD PASADENA CA 91107-6024

International Classification(s)

• B61K:OTHER AUXILIARY EQUIPMENT FOR RAILWAYS
• B61L:GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RA....
• H05B:ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE ....
• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
• B60Q:ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE....
• G01B:MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIME....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Mesher, Darel	Spruce Grove, CA	31	611

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Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date
7.5 Year Payment	$3600.00	$1800.00	$900.00	Jul 2, 2025
11.5 Year Payment	$7400.00	$3700.00	$1850.00	Jul 2, 2029

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge - 7.5 year - Late payment within 6 months	$160.00	$80.00	$40.00
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
January 02, 2018	US,9860962,B2   US9860962B2	GRANTED PATENT AS SECOND PUBLICATION
February 02, 2017	US,20170034892,A1   US20170034892A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 9860962

Light emission power control apparatus and method

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