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

Patent Owner(s)

Patent Owner	Address
DAIDO STEEL CO LTD	1-10 HIGASHISAKURA 1-CHOME HIGASHI-KU NAGOYA-SHI AICHI 461-8581

International Classification(s)

• C21D:MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Fujiwara, Masanao	Aichi, JP	3	19
Otsuka, Toshiaki	Wako, JP	6	35
Shinkawa, Masaki	Wako, JP	39	172
Umeno, Yoshikazu	Wako, JP	4	9
Yoshida, Hiroaki	Aichi, JP	263	3952

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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
July 12, 2011	US,7976651,B2   US7976651B2	GRANTED PATENT AS SECOND PUBLICATION
September 30, 2010	US,20100243110,A1   US20100243110A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7976651

Weldable steel of high strength and high toughness, and method of producing members using the same

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