Method and device for recording optical data

United States of America Patent

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Jul 11, 2006
Grant Date
Nov 20, 2003
app pub date
Mar 26, 2003
filing date
Mar 27, 2002

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Expired

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Abstract

There is provided a method and a device for recording optical data able to improve recording power setting during recording by means of PWM with a small number of pulses. During the test recording, using a period of a recording channel clock Tw as the minimum unit, marks having different mark lengths of n1Tw and n2Tw (n1

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RICOH COMPANY, LTD.

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

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Inventor Name	Address	# of filed Patents	Total Citations
Kato, Masaki	Kanagawa, JP	391	3436
Narumi, Shinya	Kanagawa, JP	30	219
Yamada, Katsuyuki	Kanagawa, JP	74	1081

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Method and device for recording optical data

Number of patents in Portfolio can not be more than 2000

United States of America Patent

10397820

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PATENT NO	7075871
APP PUB NO	20030214888A1
SERIAL NO	10397820
DOCKET NO

US Family Size	Non-US Coverage
Patent Longevity Expired	Forward Citations

DATE PUBLISHED	PUBLICATION/PATENT NO.	PUBLICATION TYPE
July 11, 2006	US,7075871,B2 US7075871B2	GRANTED PATENT AS SECOND PUBLICATION
November 20, 2003	US,20030214888,A1 US20030214888A1	FIRST PUBLISHED PATENT APPLICATION

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10397820

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