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

Patent Owner(s)

Patent Owner	Address
SENTROL INC	12345 SOUTHWEST LEVETON DRIVE TUALATIN OR 97062

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• Non-US Classification not provided for expired patents

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Dyer, Hugh D	Norton, MA	13	144
Keeler, Frank R	Needham, MA	6	50
Thornton, H Patrick	Acton, MA	13	102

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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

Full Text

US Patent No: D272530

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