Atsushi Kikugawa

Person

Higashimurayama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Channel bitword processor, PRML decoder, and optical information re...
- Patent number 9,070,412
- Issue date Jun 30, 2015
- Hitachi-LG Data Storage, Inc.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information reproduction apparatus using homodyne phase div...
- Patent number 8,958,278
- Issue date Feb 17, 2015
- Hitachi Consumer Electronics Co., Ltd.
- Takahiro Kurokawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording method, information reading method, and optic...
- Patent number 8,958,277
- Issue date Feb 17, 2015
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording medium, recording and reproduction me...
- Patent number 8,804,476
- Issue date Aug 12, 2014
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Read signal evaluation method, information recording and reading me...
- Patent number 8,705,328
- Issue date Apr 22, 2014
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording medium, optical information recording...
- Patent number 8,588,048
- Issue date Nov 19, 2013
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus
- Patent number 8,379,497
- Issue date Feb 19, 2013
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
High-speed optical disk drive
- Patent number 8,243,573
- Issue date Aug 14, 2012
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Offset compensator and optical disc drive using the same
- Patent number 8,089,845
- Issue date Jan 3, 2012
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc drive
- Patent number 8,085,633
- Issue date Dec 27, 2011
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Signal conversion module and optical disc apparatus using the same
- Patent number 8,045,431
- Issue date Oct 25, 2011
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus
- Patent number 7,969,838
- Issue date Jun 28, 2011
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Information read device and read signal processing circuit
- Patent number 7,945,002
- Issue date May 17, 2011
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk device and integrated circuit used therein
- Patent number 7,889,607
- Issue date Feb 15, 2011
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus and playback signal processing method
- Patent number 7,852,722
- Issue date Dec 14, 2010
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc apparatus with adjustable constraint length PRML
- Patent number 7,852,729
- Issue date Dec 14, 2010
- Hitachi, Ltd.
- Hiroyuki Minemura
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc drive provided with envelope defect detection function
- Patent number 7,791,993
- Issue date Sep 7, 2010
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus and PLL circuit
- Patent number 7,616,726
- Issue date Nov 10, 2009
- Hitachi, Ltd.
- Hiroyuki Minemura
- G11 - INFORMATION STORAGE
Information Patent Grant
Information read device and read signal processing circuit
- Patent number 7,483,478
- Issue date Jan 27, 2009
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Read signal processing circuit, read signal processing method, and...
- Patent number 7,446,685
- Issue date Nov 4, 2008
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic hard disk drive with countermeasure against spike noise
- Patent number 7,428,115
- Issue date Sep 23, 2008
- Hitachi Global Storage Technologies Netherlands B.V.
- Takeshi Nakagawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media, magnetic recording apparatus
- Patent number 7,399,540
- Issue date Jul 15, 2008
- Hitachi Global Storage Technologies Japan, Ltd.
- Masaaki Futamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media
- Patent number 7,316,852
- Issue date Jan 8, 2008
- Hitachi Global Storage Technologies Japan, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Stray field detector, magnetic disk drive, and method of head escaping
- Patent number 7,289,284
- Issue date Oct 30, 2007
- Hitachi Global Storage Technologies Netherlands B.V.
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording medium and magnetic recording/repr...
- Patent number 7,217,467
- Issue date May 15, 2007
- Hitachi Global Storage Technologies Japan, Ltd.
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media, manufacturing process of th...
- Patent number 7,153,546
- Issue date Dec 26, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording medium, manufacturing process of t...
- Patent number 7,153,596
- Issue date Dec 26, 2006
- Hitachi, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media, magnetic recording apparatus
- Patent number 7,147,941
- Issue date Dec 12, 2006
- Hitachi, Ltd.
- Masaaki Futamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media and magnetic storage
- Patent number 7,138,195
- Issue date Nov 21, 2006
- Hitachi, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Perpendicular magnetic recording media, manufacturing process of th...
- Patent number 7,041,393
- Issue date May 9, 2006
- Hitachi Global Storage Technologies Japan, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
CHANNEL BITWORD PROSESSOR, PRML DECODER, AND OPTICAL INFORMATION RE...
- Publication number 20160027468
- Publication date Jan 28, 2016
- Hitachi-LG Data Storage, Inc.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
CHANNEL BITWORD PROCESSOR, PRML DECODER, AND OPTICAL INFORMATION RE...
- Publication number 20150043321
- Publication date Feb 12, 2015
- Hitachi-LG Data Storage, Inc.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
MODULATION/DEMODULATION METHOD, DEMODULATION APPARATUS, AND CODE MO...
- Publication number 20140344642
- Publication date Nov 20, 2014
- HITACHI CONSUMER ELECTRONICS CO., LTD.
- Atsushi KIKUGAWA
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL INFORMATION RECORDING MEDIUM, RECORDING AND REPRODUCTION ME...
- Publication number 20140036652
- Publication date Feb 6, 2014
- Hitachi-LG Data Storage, Inc.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION REPRODUCTION APPARATUS
- Publication number 20140029405
- Publication date Jan 30, 2014
- HITACHI CONSUMER ELECTRONICS CO., LTD.
- Takahiro KUROKAWA
- G11 - INFORMATION STORAGE
Information Patent Application
READ SIGNAL EVALUATION METHOD, INFORMATION RECORDING AND READING ME...
- Publication number 20120213049
- Publication date Aug 23, 2012
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
INFORMATION RECORDING METHOD, INFORMATION READING METHOD, AND OPTIC...
- Publication number 20120134247
- Publication date May 31, 2012
- Hitachi Consumer Electronics Co., Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISC DRIVE
- Publication number 20110080822
- Publication date Apr 7, 2011
- HITACHI CONSUMER ELECTRONICS CO., LTD.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISK APPARATUS
- Publication number 20100085858
- Publication date Apr 8, 2010
- ATSUSHI KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
SIGNAL CONVERSION MODULE AND OPTICAL DISC APPARATUS USING THE SAME
- Publication number 20100027390
- Publication date Feb 4, 2010
- HITACHI CONSUMER ELECTRONICS CO., LTD.
- Atsushi KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
HIGH-SPEED OPTICAL DISK DRIVE
- Publication number 20090196156
- Publication date Aug 6, 2009
- ATSUSHI KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
Information Read Device And Read Signal Processing Circuit
- Publication number 20090136219
- Publication date May 28, 2009
- Atsushi Kikugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
OFFSET COMPENSATOR AND OPTICAL DISC DRIVE USING THE SAME
- Publication number 20090135699
- Publication date May 28, 2009
- ATSUSHI KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISK MEDIUM, INFORMATION RECORDING METHOD, AND OPTICAL DISK...
- Publication number 20090103418
- Publication date Apr 23, 2009
- Hitachi, Ltd.
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION REPRODUCING METHOD, OPTICAL INFORMATION REPRODU...
- Publication number 20090086602
- Publication date Apr 2, 2009
- Hitachi, Ltd.
- Junko Ushiyama
- G11 - INFORMATION STORAGE
Information Patent Application
READ SIGNAL PROCESSING CIRCUIT, READ SIGNAL PROCESSING METHOD, AND...
- Publication number 20080284630
- Publication date Nov 20, 2008
- Atsushi Kikugawa
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
OPTICAL DISK APPARATUS
- Publication number 20080219132
- Publication date Sep 11, 2008
- ATSUSHI KIKUGAWA
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disc drive provided with envelope defect detection function
- Publication number 20080130442
- Publication date Jun 5, 2008
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk apparatus and playback signal processing method
- Publication number 20070242580
- Publication date Oct 18, 2007
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk device and integrated circuit used therein
- Publication number 20070053262
- Publication date Mar 8, 2007
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic recording media, magnetic recording apparatus
- Publication number 20070037018
- Publication date Feb 15, 2007
- Masaaki Futamoto
- G11 - INFORMATION STORAGE
Information Patent Application
Information read device and read signal processing circuit
- Publication number 20060280240
- Publication date Dec 14, 2006
- Atsushi Kikugawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical disk apparatus and PLL circuit
- Publication number 20060203949
- Publication date Sep 14, 2006
- Hiroyuki Minemura
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disc apparatus
- Publication number 20060087947
- Publication date Apr 27, 2006
- Hiroyuki Minemura
- G11 - INFORMATION STORAGE
Information Patent Application
Stray field detector, magnetic disk drive, and method of head escaping
- Publication number 20060028747
- Publication date Feb 9, 2006
- Hitachi Global Storage Technologies
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic hard disk drive with countermeasure against spike noise
- Publication number 20050233177
- Publication date Oct 20, 2005
- Hitachi Global Storage Technologies Netherlands B.V.
- Takeshi Nakagawa
- G11 - INFORMATION STORAGE
Information Patent Application
Method for testing or recording servo signal on perpendicular magne...
- Publication number 20050204285
- Publication date Sep 15, 2005
- Atsushi Kikugawa
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic recording media
- Publication number 20050042479
- Publication date Feb 24, 2005
- Hitachi, Ltd.
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic recording medium and magnetic recording/repr...
- Publication number 20040233565
- Publication date Nov 25, 2004
- Reiko Arai
- G11 - INFORMATION STORAGE
Information Patent Application
Perpendicular magnetic recording medium, manufacturing process of t...
- Publication number 20040234818
- Publication date Nov 25, 2004
- Kiwamu Tanahashi
- G11 - INFORMATION STORAGE

Atsushi Kikugawa

Person

Patents Grantslast 30 patents

Channel bitword processor, PRML decoder, and optical information re...

Optical information reproduction apparatus using homodyne phase div...

Information recording method, information reading method, and optic...

Optical information recording medium, recording and reproduction me...

Read signal evaluation method, information recording and reading me...

Optical information recording medium, optical information recording...

Optical disk apparatus

High-speed optical disk drive

Offset compensator and optical disc drive using the same

Optical disc drive

Signal conversion module and optical disc apparatus using the same

Optical disk apparatus

Information read device and read signal processing circuit

Optical disk device and integrated circuit used therein

Optical disk apparatus and playback signal processing method

Optical disc apparatus with adjustable constraint length PRML

Optical disc drive provided with envelope defect detection function

Optical disk apparatus and PLL circuit

Information read device and read signal processing circuit

Read signal processing circuit, read signal processing method, and...

Magnetic hard disk drive with countermeasure against spike noise

Perpendicular magnetic recording media, magnetic recording apparatus

Perpendicular magnetic recording media

Stray field detector, magnetic disk drive, and method of head escaping

Perpendicular magnetic recording medium and magnetic recording/repr...

Perpendicular magnetic recording media, manufacturing process of th...

Perpendicular magnetic recording medium, manufacturing process of t...

Perpendicular magnetic recording media, magnetic recording apparatus

Perpendicular magnetic recording media and magnetic storage

Perpendicular magnetic recording media, manufacturing process of th...

Patents Applicationslast 30 patents

CHANNEL BITWORD PROSESSOR, PRML DECODER, AND OPTICAL INFORMATION RE...

CHANNEL BITWORD PROCESSOR, PRML DECODER, AND OPTICAL INFORMATION RE...

MODULATION/DEMODULATION METHOD, DEMODULATION APPARATUS, AND CODE MO...

OPTICAL INFORMATION RECORDING MEDIUM, RECORDING AND REPRODUCTION ME...

OPTICAL INFORMATION REPRODUCTION APPARATUS

READ SIGNAL EVALUATION METHOD, INFORMATION RECORDING AND READING ME...

INFORMATION RECORDING METHOD, INFORMATION READING METHOD, AND OPTIC...

OPTICAL DISC DRIVE

OPTICAL DISK APPARATUS

SIGNAL CONVERSION MODULE AND OPTICAL DISC APPARATUS USING THE SAME

HIGH-SPEED OPTICAL DISK DRIVE

Information Read Device And Read Signal Processing Circuit

OFFSET COMPENSATOR AND OPTICAL DISC DRIVE USING THE SAME

OPTICAL DISK MEDIUM, INFORMATION RECORDING METHOD, AND OPTICAL DISK...

OPTICAL INFORMATION REPRODUCING METHOD, OPTICAL INFORMATION REPRODU...

READ SIGNAL PROCESSING CIRCUIT, READ SIGNAL PROCESSING METHOD, AND...

OPTICAL DISK APPARATUS

Optical disc drive provided with envelope defect detection function

Optical disk apparatus and playback signal processing method

Optical disk device and integrated circuit used therein

Perpendicular magnetic recording media, magnetic recording apparatus

Information read device and read signal processing circuit

Optical disk apparatus and PLL circuit

Optical disc apparatus

Stray field detector, magnetic disk drive, and method of head escaping

Magnetic hard disk drive with countermeasure against spike noise

Method for testing or recording servo signal on perpendicular magne...

Perpendicular magnetic recording media

Perpendicular magnetic recording medium and magnetic recording/repr...

Perpendicular magnetic recording medium, manufacturing process of t...