Ryuichi Katayama

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Light emitting element having structural bodies arrayed at a first...
- Patent number 9,028,070
- Issue date May 12, 2015
- NEC Corporation
- Mizuho Tomiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Polarized light emitting element for display apparatus
- Patent number 9,016,883
- Issue date Apr 28, 2015
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light emitting element and image display apparatus using the light...
- Patent number 8,866,172
- Issue date Oct 21, 2014
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Wavelength plate, light emitting element, and image display device...
- Patent number 8,807,769
- Issue date Aug 19, 2014
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Grant
Light emitting element and image display device using the light emi...
- Patent number 8,779,454
- Issue date Jul 15, 2014
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Light emitting element and image display apparatus using the light...
- Patent number 8,643,050
- Issue date Feb 4, 2014
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Grant
Optical information recording/ reproducing apparatus and optical in...
- Patent number 8,254,238
- Issue date Aug 28, 2012
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording/reproducing device, optical unit, and...
- Patent number 8,238,219
- Issue date Aug 7, 2012
- NEC Corporation
- Shin Tominaga
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording/ reproducing device and optical infor...
- Patent number 8,045,442
- Issue date Oct 25, 2011
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device for detecting an error signal and an optical in...
- Patent number 8,036,092
- Issue date Oct 11, 2011
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head apparatus and optical information recording/reproducin...
- Patent number 7,948,854
- Issue date May 24, 2011
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head apparatus and optical information recording or reprodu...
- Patent number 7,787,348
- Issue date Aug 31, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for detecting radial tilt of optical recording medium in opt...
- Patent number 7,755,991
- Issue date Jul 13, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical recording and reproducing apparatus
- Patent number 7,715,296
- Issue date May 11, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording or reproducin...
- Patent number 7,710,849
- Issue date May 4, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device, optical information recording/reproducing appa...
- Patent number 7,622,696
- Issue date Nov 24, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording/reproduction...
- Patent number 7,599,276
- Issue date Oct 6, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording or reproducin...
- Patent number 7,564,762
- Issue date Jul 21, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Birefringence characteristic measuring method, optical recording me...
- Patent number 7,542,401
- Issue date Jun 2, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical recording and reproducing apparatus
- Patent number 7,414,951
- Issue date Aug 19, 2008
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording/reproducing d...
- Patent number 7,411,882
- Issue date Aug 12, 2008
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk device for detecting thickness errors of the transpare...
- Patent number 7,355,932
- Issue date Apr 8, 2008
- NEC Corporation
- Hidekazu Shirakawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk medium and optical disk recording/reproducing apparatu...
- Patent number 7,336,576
- Issue date Feb 26, 2008
- Kabushiki Kaisha Toshiba
- Yutaka Yamanaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Radial tilt compensating optical disk apparatus using tracking cont...
- Patent number 7,327,643
- Issue date Feb 5, 2008
- NEC Corporation
- Naotoshi Iwazawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Birefringence characteristic measuring method, optical recording me...
- Patent number 7,272,091
- Issue date Sep 18, 2007
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head unit and optical information writing/reading device
- Patent number 7,242,647
- Issue date Jul 10, 2007
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Radial tilt detection optical head apparatus and optical informatio...
- Patent number 7,200,076
- Issue date Apr 3, 2007
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording/reproducing a...
- Patent number 7,136,344
- Issue date Nov 14, 2006
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head device and optical information recording or reproducin...
- Patent number 7,085,218
- Issue date Aug 1, 2006
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical head apparatus including two light sources and one photodet...
- Patent number 6,980,505
- Issue date Dec 27, 2005
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...
- Publication number 20130021774
- Publication date Jan 24, 2013
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
WAVELENGTH PLATE, LIGHT EMITTING ELEMENT, AND IMAGE DISPLAY DEVICE...
- Publication number 20130021773
- Publication date Jan 24, 2013
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Application
LIGHT SOURCE UNIT AND IMAGE DISPLAY DEVICE
- Publication number 20130016139
- Publication date Jan 17, 2013
- NEC Corporation
- Mizuho Tomiyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
LIGHT EMITTING ELEMENT AND IMAGE DISPLAY DEVICE USING THE LIGHT EMI...
- Publication number 20120280265
- Publication date Nov 8, 2012
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
LIGHT EMITTING ELEMENT AND PROJECTION DISPLAY DEVICE PROVIDED WITH...
- Publication number 20120224147
- Publication date Sep 6, 2012
- NEC Corporation
- Mizuho Tomiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...
- Publication number 20120217529
- Publication date Aug 30, 2012
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Application
LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...
- Publication number 20120199855
- Publication date Aug 9, 2012
- NEC Corporation
- Ryuichi Katayama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
OPTICAL INFORMATION RECORDING/ REPRODUCING APPARATUS AND OPTICAL IN...
- Publication number 20120075977
- Publication date Mar 29, 2012
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL UNIT, CONTROL METHOD, AND OPTICAL INFORMATION RECORDING/REP...
- Publication number 20110110207
- Publication date May 12, 2011
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE, OPTICAL UNIT, AND...
- Publication number 20110026390
- Publication date Feb 3, 2011
- Shin Tominaga
- G11 - INFORMATION STORAGE
Information Patent Application
Optical head device and optical information recording/reproducing d...
- Publication number 20100309770
- Publication date Dec 9, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical Head Device and Optical Information Recording/Reproducing D...
- Publication number 20100226234
- Publication date Sep 9, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...
- Publication number 20100220577
- Publication date Sep 2, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...
- Publication number 20100142355
- Publication date Jun 10, 2010
- NEC Corporation
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING D...
- Publication number 20100085495
- Publication date Apr 8, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, AND OPTICAL INFORMATION RECORDING/REPRODUCING...
- Publication number 20100085860
- Publication date Apr 8, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING D...
- Publication number 20100074077
- Publication date Mar 25, 2010
- Ryuichi Katayama
- G02 - OPTICS
Information Patent Application
OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APP...
- Publication number 20100061217
- Publication date Mar 11, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD UNIT AND OPTCAL INFORMATION RECORDING/REPRODUCING APPA...
- Publication number 20100061216
- Publication date Mar 11, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL RECORDING MEDIUM, OPTICAL HEAD DEVICE AND OPTICAL INFORMATI...
- Publication number 20100046353
- Publication date Feb 25, 2010
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...
- Publication number 20100027384
- Publication date Feb 4, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...
- Publication number 20100019126
- Publication date Jan 28, 2010
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...
- Publication number 20090290473
- Publication date Nov 26, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APP...
- Publication number 20090274020
- Publication date Nov 5, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...
- Publication number 20090257339
- Publication date Oct 15, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL INFORMATION RECORDING/ REPRODUCING DEVICE AND OPTICAL INFOR...
- Publication number 20090252011
- Publication date Oct 8, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical head device and optical information reproducing device
- Publication number 20090190457
- Publication date Jul 30, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
OPTICAL HEAD AND OPTICAL INFORMATION RECORDER/REPRODUCER EMPLOYING IT
- Publication number 20090147658
- Publication date Jun 11, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical Head Device, Optical Information Recording/Reproducing Appa...
- Publication number 20090121117
- Publication date May 14, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical system for detecting data signal and tracking error signal...
- Publication number 20090052301
- Publication date Feb 26, 2009
- NEC Corporation
- Ryuichi Katayama
- G11 - INFORMATION STORAGE

Ryuichi Katayama

Person

Patents Grantslast 30 patents

Light emitting element having structural bodies arrayed at a first...

Polarized light emitting element for display apparatus

Light emitting element and image display apparatus using the light...

Wavelength plate, light emitting element, and image display device...

Light emitting element and image display device using the light emi...

Light emitting element and image display apparatus using the light...

Optical information recording/ reproducing apparatus and optical in...

Optical information recording/reproducing device, optical unit, and...

Optical information recording/ reproducing device and optical infor...

Optical head device for detecting an error signal and an optical in...

Optical head apparatus and optical information recording/reproducin...

Optical head apparatus and optical information recording or reprodu...

Method for detecting radial tilt of optical recording medium in opt...

Optical head device and optical recording and reproducing apparatus

Optical head device and optical information recording or reproducin...

Optical head device, optical information recording/reproducing appa...

Optical head device and optical information recording/reproduction...

Optical head device and optical information recording or reproducin...

Birefringence characteristic measuring method, optical recording me...

Optical head device and optical recording and reproducing apparatus

Optical head device and optical information recording/reproducing d...

Optical disk device for detecting thickness errors of the transpare...

Optical disk medium and optical disk recording/reproducing apparatu...

Radial tilt compensating optical disk apparatus using tracking cont...

Birefringence characteristic measuring method, optical recording me...

Optical head unit and optical information writing/reading device

Radial tilt detection optical head apparatus and optical informatio...

Optical head device and optical information recording/reproducing a...

Optical head device and optical information recording or reproducin...

Optical head apparatus including two light sources and one photodet...

Patents Applicationslast 30 patents

LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...

WAVELENGTH PLATE, LIGHT EMITTING ELEMENT, AND IMAGE DISPLAY DEVICE...

LIGHT SOURCE UNIT AND IMAGE DISPLAY DEVICE

LIGHT EMITTING ELEMENT AND IMAGE DISPLAY DEVICE USING THE LIGHT EMI...

LIGHT EMITTING ELEMENT AND PROJECTION DISPLAY DEVICE PROVIDED WITH...

LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...

LIGHT EMITTING ELEMENT AND IMAGE DISPLAY APPARATUS USING THE LIGHT...

OPTICAL INFORMATION RECORDING/ REPRODUCING APPARATUS AND OPTICAL IN...

OPTICAL UNIT, CONTROL METHOD, AND OPTICAL INFORMATION RECORDING/REP...

OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE, OPTICAL UNIT, AND...

Optical head device and optical information recording/reproducing d...

Optical Head Device and Optical Information Recording/Reproducing D...

OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING D...

OPTICAL HEAD DEVICE, AND OPTICAL INFORMATION RECORDING/REPRODUCING...

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING/REPRODUCING D...

OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APP...

OPTICAL HEAD UNIT AND OPTCAL INFORMATION RECORDING/REPRODUCING APPA...

OPTICAL RECORDING MEDIUM, OPTICAL HEAD DEVICE AND OPTICAL INFORMATI...

OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...

OPTICAL HEAD DEVICE, OPTICAL INFORMATION RECORDING/REPRODUCING DEVI...

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...

OPTICAL HEAD UNIT AND OPTICAL INFORMATION RECORDING/REPRODUCING APP...

OPTICAL HEAD DEVICE AND OPTICAL INFORMATION RECORDING OR REPRODUCIN...

OPTICAL INFORMATION RECORDING/ REPRODUCING DEVICE AND OPTICAL INFOR...

Optical head device and optical information reproducing device

OPTICAL HEAD AND OPTICAL INFORMATION RECORDER/REPRODUCER EMPLOYING IT

Optical Head Device, Optical Information Recording/Reproducing Appa...

Optical system for detecting data signal and tracking error signal...