Masahiro Birukawa

Person

Hirakata-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Information recording medium and recording/reproducing method for t...
- Patent number 8,526,293
- Issue date Sep 3, 2013
- Panasonic Corporation
- Rie Kojima
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information reproduction device, optical information record...
- Patent number 8,451,699
- Issue date May 28, 2013
- Panasonic Corporation
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Grant
Device and method for recording and/or reproducing data onto/from i...
- Patent number 8,422,341
- Issue date Apr 16, 2013
- Panasonic Corporation
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information reproducing device, optical information reprodu...
- Patent number 8,385,161
- Issue date Feb 26, 2013
- Panasonic Corporation
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Grant
Near-field recording head capable of directly forming light source...
- Patent number 8,279,721
- Issue date Oct 2, 2012
- Panasonic Corporation
- Hideki Aikoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording/reproduction method, optical recording/reproducti...
- Patent number 8,259,541
- Issue date Sep 4, 2012
- Panasonic Corporation
- Eiichi Ito
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical system for compensating for coma aberration and/or spherica...
- Patent number 8,233,372
- Issue date Jul 31, 2012
- Panasonic Corporation
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical system for compensating for spherical aberration and/or com...
- Patent number 8,179,768
- Issue date May 15, 2012
- Panasonic Corporation
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording and/or reproducing apparatus, optical...
- Patent number 8,130,623
- Issue date Mar 6, 2012
- Panasonic Corporation
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recorder/reproducer, optical information record...
- Patent number 8,130,625
- Issue date Mar 6, 2012
- Panasonic Corporation
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Grant
Near-field light detection element and information reproducing medi...
- Patent number 8,050,150
- Issue date Nov 1, 2011
- Panasonic Corporation
- Takashi Mihara
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical disk device and tilt correction method for optical disk device
- Patent number 8,040,774
- Issue date Oct 18, 2011
- Panasonic Corporation
- Ryutaro Futakuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Gap controller and optical information processor
- Patent number 7,957,232
- Issue date Jun 7, 2011
- Panasonic Corporation
- Ryutaro Futakuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc device, method for activating optical disc device, and...
- Patent number 7,948,835
- Issue date May 24, 2011
- Panasonic Corporation
- Ryutaro Futakuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information apparatus with gap control system
- Patent number 7,944,799
- Issue date May 17, 2011
- Panasonic Corporation
- Ryutaro Futakuchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium, and manufacturing method, manufacturing...
- Patent number 7,773,343
- Issue date Aug 10, 2010
- Panasonic Corporation
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc tracking control device, tracking control method, and...
- Patent number 7,420,889
- Issue date Sep 2, 2008
- Matsushita Electric Industrial Co., Ltd.
- Kenzo Ishibashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium, method of manufacturing magneto-o...
- Patent number 7,235,313
- Issue date Jun 26, 2007
- Matsushita Electic Industrial Co., Ltd.
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium having a recording layer of column...
- Patent number 7,180,831
- Issue date Feb 20, 2007
- Matsushita Electric Industrial Co., Ltd.
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc cutting apparatus and method for manufacturing optical...
- Patent number 7,180,842
- Issue date Feb 20, 2007
- Matsushita Electric Industrial Co., Ltd.
- Kenzo Ishibashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium and method for producing the same
- Patent number 7,126,886
- Issue date Oct 24, 2006
- Matsushita Electric Industrial Co., Ltd.
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Grant
Recording/reproducing head and recording/reproducing apparatus inco...
- Patent number 6,982,932
- Issue date Jan 3, 2006
- Matsushita Electric Industrial Co., Ltd.
- Hiroshi Sakakima
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium having a GDFECO readout magnetic film
- Patent number 6,811,889
- Issue date Nov 2, 2004
- Matsushita Electric Industrial Co., Ltd.
- Yoshihiko Kudoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk and method of magnetically separating tracks of the op...
- Patent number 6,765,847
- Issue date Jul 20, 2004
- Matsushita Electric Industrial Co., Ltd.
- Masahiro Birukawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium, and method and apparatus for prod...
- Patent number 6,747,919
- Issue date Jun 8, 2004
- Matsushita Electric Industrial Co., Ltd.
- Yuuko Kawaguchi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk with magnetic layer separated magnetically between tra...
- Patent number 6,690,626
- Issue date Feb 10, 2004
- Matsushita Electric Industrial Co., Ltd.
- Masahiro Birukawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic head having magnetoresistance device and recording/reprodu...
- Patent number 6,650,598
- Issue date Nov 18, 2003
- Matsushita Electric Industrial Co., Ltd.
- Hiroshi Sakakima
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium
- Patent number 6,521,357
- Issue date Feb 18, 2003
- Matsushita Electric Industrial Co, Ltd.
- Yoshihiko Kudoh
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical head having thickness of the core same as a track w...
- Patent number 6,504,796
- Issue date Jan 7, 2003
- Matsushita Electric Industrial Co., Ltd.
- Hiroshi Sakakima
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording medium
- Patent number 6,399,227
- Issue date Jun 4, 2002
- Matsushita Electric Industrial Co., Ltd.
- Yoshihiko Kudoh
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
OPTICAL INFORMATION REPRODUCTION DEVICE, OPTICAL INFORMATION RECORD...
- Publication number 20120314553
- Publication date Dec 13, 2012
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Application
INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING INFORMATI...
- Publication number 20120020199
- Publication date Jan 26, 2012
- Kazuya Hisada
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION REPRODUCING DEVICE, OPTICAL INFORMATION REPRODU...
- Publication number 20110310719
- Publication date Dec 22, 2011
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS, OPTICAL...
- Publication number 20110069599
- Publication date Mar 24, 2011
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL RECORDING/REPRODUCTION METHOD, OPTICAL RECORDING/REPRODUCTI...
- Publication number 20110007613
- Publication date Jan 13, 2011
- Eiichi Ito
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISK DEVICE AND TILT CORRECTION METHOD FOR OPTICAL DISK DEVICE
- Publication number 20110002208
- Publication date Jan 6, 2011
- Ryutaro FUTAKUCHI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE...
- Publication number 20100278030
- Publication date Nov 4, 2010
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE...
- Publication number 20100254248
- Publication date Oct 7, 2010
- Yasuhiro Tanaka
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION RECORDER/REPRODUCER, OPTICAL INFORMATION RECORD...
- Publication number 20100232264
- Publication date Sep 16, 2010
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Application
INFORMATION RECORDING MEDIUM AND RECORDING/REPRODUCING METHOD FOR T...
- Publication number 20100220574
- Publication date Sep 2, 2010
- PANASONIC CORPORATION
- Rie Kojima
- G11 - INFORMATION STORAGE
Information Patent Application
DEVICE AND METHOD FOR RECORDING AND/OR REPRODUCING DATA ONTO/FROM I...
- Publication number 20100118665
- Publication date May 13, 2010
- Kenji Narumi
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION DEVICE
- Publication number 20090310467
- Publication date Dec 17, 2009
- Ryutaro FUTAKUCHI
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL DISC DEVICE, METHOD FOR ACTIVATING OPTICAL DISC DEVICE, AND...
- Publication number 20090290456
- Publication date Nov 26, 2009
- Ryutaro FUTAKUCHI
- G11 - INFORMATION STORAGE
Information Patent Application
NEAR-FIELD OPTICAL HEAD, NEAR-FIELD OPTICAL HEAD DEVICE, NEAR-FIELD...
- Publication number 20090161499
- Publication date Jun 25, 2009
- Hideki Aikoh
- G11 - INFORMATION STORAGE
Information Patent Application
GAP CONTROLLER AND OPTICAL INFORMATION PROCESSOR
- Publication number 20090129240
- Publication date May 21, 2009
- Ryutaro FUTAKUCHI
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic Recording Medium, and Manufacturing Method, Manufacturing...
- Publication number 20080291573
- Publication date Nov 27, 2008
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic Recording Medium, and Manufacturing Method and Manufacturi...
- Publication number 20070243417
- Publication date Oct 18, 2007
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Magneto-optical recording medium and method for manufacturing the same
- Publication number 20050086679
- Publication date Apr 21, 2005
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Method of forming film on optical disk
- Publication number 20040252624
- Publication date Dec 16, 2004
- Motoyoshi Murakami
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Magneto-optical recording medium, method of manufacturing magneto-o...
- Publication number 20040121189
- Publication date Jun 24, 2004
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Magneto-optical record medium
- Publication number 20040076083
- Publication date Apr 22, 2004
- Koichiro Nishikawa
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording medium, method for producing the same and magnet...
- Publication number 20040057343
- Publication date Mar 25, 2004
- Matsushita Electric Industrial Co., Ltd.
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Recording/reproducing head and recording/reproducing apparatus inco...
- Publication number 20040047080
- Publication date Mar 11, 2004
- Matsushita Electric Industrial Co. Ltd.
- Hiroshi Sakakima
- G11 - INFORMATION STORAGE
Information Patent Application
Recording/reproducing head and recording/reproducing apparatus inco...
- Publication number 20030072221
- Publication date Apr 17, 2003
- MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- Hiroshi Sakakima
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disc cutting apparatus and method for manufacturing optical...
- Publication number 20030067851
- Publication date Apr 10, 2003
- Matsushita Electric Industrial Co., Ltd.
- Kenzo Ishibashi
- G11 - INFORMATION STORAGE
Information Patent Application
Magneto-optical recording medium and method for producing the same
- Publication number 20030058751
- Publication date Mar 27, 2003
- Matsushita Electric Industrial Co., Ltd.
- Motoyoshi Murakami
- G11 - INFORMATION STORAGE
Information Patent Application
Magneto-optical recording medium, and method and apparatus for prod...
- Publication number 20020196712
- Publication date Dec 26, 2002
- Matsushita Electric Industrial Co., Ltd.
- Yuuko Kawaguchi
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk and method of magnetically separating tracks of the op...
- Publication number 20020154580
- Publication date Oct 24, 2002
- Matsushita Electric Industrial Co., Ltd.
- Masahiro Birukawa
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk and method of magnetically separating tracks of the op...
- Publication number 20020154579
- Publication date Oct 24, 2002
- Matsushita Electric Industrial Co., Ltd.
- Masahiro Birukawa
- G11 - INFORMATION STORAGE
Information Patent Application
Magneto-optical recording medium
- Publication number 20020119348
- Publication date Aug 29, 2002
- Yoshihiko Kudoh
- G11 - INFORMATION STORAGE

Masahiro Birukawa

Person

Patents Grantslast 30 patents

Information recording medium and recording/reproducing method for t...

Optical information reproduction device, optical information record...

Device and method for recording and/or reproducing data onto/from i...

Optical information reproducing device, optical information reprodu...

Near-field recording head capable of directly forming light source...

Optical recording/reproduction method, optical recording/reproducti...

Optical system for compensating for coma aberration and/or spherica...

Optical system for compensating for spherical aberration and/or com...

Optical information recording and/or reproducing apparatus, optical...

Optical information recorder/reproducer, optical information record...

Near-field light detection element and information reproducing medi...

Optical disk device and tilt correction method for optical disk device

Gap controller and optical information processor

Optical disc device, method for activating optical disc device, and...

Optical information apparatus with gap control system

Magnetic recording medium, and manufacturing method, manufacturing...

Optical disc tracking control device, tracking control method, and...

Magneto-optical recording medium, method of manufacturing magneto-o...

Magneto-optical recording medium having a recording layer of column...

Optical disc cutting apparatus and method for manufacturing optical...

Magneto-optical recording medium and method for producing the same

Recording/reproducing head and recording/reproducing apparatus inco...

Magneto-optical recording medium having a GDFECO readout magnetic film

Optical disk and method of magnetically separating tracks of the op...

Magneto-optical recording medium, and method and apparatus for prod...

Optical disk with magnetic layer separated magnetically between tra...

Magnetic head having magnetoresistance device and recording/reprodu...

Magneto-optical recording medium

Magneto-optical head having thickness of the core same as a track w...

Magneto-optical recording medium

Patents Applicationslast 30 patents

OPTICAL INFORMATION REPRODUCTION DEVICE, OPTICAL INFORMATION RECORD...

INFORMATION RECORDING MEDIUM AND METHOD FOR MANUFACTURING INFORMATI...

OPTICAL INFORMATION REPRODUCING DEVICE, OPTICAL INFORMATION REPRODU...

OPTICAL INFORMATION RECORDING AND/OR REPRODUCING APPARATUS, OPTICAL...

OPTICAL RECORDING/REPRODUCTION METHOD, OPTICAL RECORDING/REPRODUCTI...

OPTICAL DISK DEVICE AND TILT CORRECTION METHOD FOR OPTICAL DISK DEVICE

OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE...

OPTICAL PICKUP OPTICAL SYSTEM AND OPTICAL PICKUP DEVICE HAVING THE...

OPTICAL INFORMATION RECORDER/REPRODUCER, OPTICAL INFORMATION RECORD...

INFORMATION RECORDING MEDIUM AND RECORDING/REPRODUCING METHOD FOR T...

DEVICE AND METHOD FOR RECORDING AND/OR REPRODUCING DATA ONTO/FROM I...

OPTICAL INFORMATION DEVICE

OPTICAL DISC DEVICE, METHOD FOR ACTIVATING OPTICAL DISC DEVICE, AND...

NEAR-FIELD OPTICAL HEAD, NEAR-FIELD OPTICAL HEAD DEVICE, NEAR-FIELD...

GAP CONTROLLER AND OPTICAL INFORMATION PROCESSOR

Magnetic Recording Medium, and Manufacturing Method, Manufacturing...

Magnetic Recording Medium, and Manufacturing Method and Manufacturi...

Magneto-optical recording medium and method for manufacturing the same

Method of forming film on optical disk

Magneto-optical recording medium, method of manufacturing magneto-o...

Magneto-optical record medium

Magnetic recording medium, method for producing the same and magnet...

Recording/reproducing head and recording/reproducing apparatus inco...

Recording/reproducing head and recording/reproducing apparatus inco...

Optical disc cutting apparatus and method for manufacturing optical...

Magneto-optical recording medium and method for producing the same

Magneto-optical recording medium, and method and apparatus for prod...

Optical disk and method of magnetically separating tracks of the op...

Optical disk and method of magnetically separating tracks of the op...

Magneto-optical recording medium