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

Patent Owner(s)

• RICOH COMPANY, LTD.

International Classification(s)

• G11B:INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BET....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Iwasa, Hiroyuki	Yokohama, JP	31	252
Shinkai, Masaru	Yokohama, JP	52	589
Shinotsuka, Michiaki	Hiratsuka, JP	56	457

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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
April 05, 2011	US,7920454,B2   US7920454B2	GRANTED PATENT AS SECOND PUBLICATION
May 11, 2006	US,20060098561,A1   US20060098561A1	FIRST PUBLISHED PATENT APPLICATION

Full Text

US Patent No: 7920454

Optical recording medium, and method and apparatus for optical recording and reproducing thereof

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