Hiroshi AKIYAMA

Person

Yokohama-shi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Coupling lens, illuminating device, and electronic device
- Patent number 9,223,140
- Issue date Dec 29, 2015
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G02 - OPTICS
Information Patent Grant
Optical scan unit, image projector including the same, vehicle head...
- Patent number 8,810,880
- Issue date Aug 19, 2014
- Ricoh Company, Ltd.
- Yukiko Hamano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Lighting device and projection image display unit
- Patent number 8,147,069
- Issue date Apr 3, 2012
- Ricoh Company, Limited
- Manabu Seo
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus and optical disk drive apparatus
- Patent number 8,023,386
- Issue date Sep 20, 2011
- Ricoh Company, Ltd.
- Masahiko Nakayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus compatible with different types of mediums a...
- Patent number 7,680,015
- Issue date Mar 16, 2010
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Aberration adjustment device, method thereof, optical pickup, and o...
- Patent number 7,602,690
- Issue date Oct 13, 2009
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical scanning device and image forming apparatus
- Patent number 7,495,813
- Issue date Feb 24, 2009
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical disk apparatus compatible with different types of mediums a...
- Patent number 7,403,453
- Issue date Jul 22, 2008
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus
- Patent number RE40414
- Issue date Jul 1, 2008
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- 369 - Dynamic information storage or retrieval
Information Patent Grant
Optical pickup apparatus and optical disk drive apparatus
- Patent number 7,359,295
- Issue date Apr 15, 2008
- Ricoh Company, Ltd.
- Masahiko Nakayama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus compatible with different types of optical...
- Patent number 7,088,645
- Issue date Aug 8, 2006
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical element, optical pickup unit, and optical disk drive unit
- Patent number 7,050,380
- Issue date May 23, 2006
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical-pickup device and tilt-detecting method thereof
- Patent number 6,735,157
- Issue date May 11, 2004
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical-pickup device and tilt-detecting method thereof
- Patent number 6,545,958
- Issue date Apr 8, 2003
- Ricoh Company, Ltd.
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device applicable to two kinds of recording media wi...
- Patent number 6,343,058
- Issue date Jan 29, 2002
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus compatible with different types of mediums a...
- Patent number 6,272,098
- Issue date Aug 7, 2001
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device
- Patent number 6,240,053
- Issue date May 29, 2001
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk apparatus compatible with different types of mediums
- Patent number 6,195,315
- Issue date Feb 27, 2001
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pick-up device for processing central and peripheral optica...
- Patent number 6,122,241
- Issue date Sep 19, 2000
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device for accessing each of optical disks of differ...
- Patent number 5,894,466
- Issue date Apr 13, 1999
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus
- Patent number 5,870,370
- Issue date Feb 9, 1999
- Ricoh Company, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup device for accessing each of optical disks of differ...
- Patent number 5,717,678
- Issue date Feb 10, 1998
- Ricoh Company, Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pickup apparatus
- Patent number 5,694,385
- Issue date Dec 2, 1997
- Ricoh Comany, Ltd.
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Infinitesimal displacement measuring apparatus and optical pick-up...
- Patent number 5,572,323
- Issue date Nov 5, 1996
- Ricoh Company, Ltd.
- Hideo Maeda
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical pick-up device with a multifunctional prism
- Patent number 5,488,599
- Issue date Jan 30, 1996
- Ricoh Co., Ltd.
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
COUPLING LENS, ILLUMINATING DEVICE, AND ELECTRONIC DEVICE
- Publication number 20110249240
- Publication date Oct 13, 2011
- Yoshitaka Takahashi
- G02 - OPTICS
Information Patent Application
OPTICAL SCAN UNIT, IMAGE PROJECTOR INCLUDING THE SAME, VEHICLE HEAD...
- Publication number 20110128602
- Publication date Jun 2, 2011
- Yukiko Hamano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
PROJECTION-TYPE IMAGE DISPLAYING APPARATUS
- Publication number 20100302513
- Publication date Dec 2, 2010
- YOSHITAKA TAKAHASHI
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
LIGHTING DEVICE AND PROJECTION IMAGE DISPLAY UNIT
- Publication number 20100033685
- Publication date Feb 11, 2010
- Manabu SEO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical pickup apparatus and optical disk drive apparatus
- Publication number 20080165657
- Publication date Jul 10, 2008
- Masahiko Nakayama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk apparatus compatible with different types of mediums a...
- Publication number 20080037399
- Publication date Feb 14, 2008
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Application
Optical scanning device and image forming apparatus
- Publication number 20060245009
- Publication date Nov 2, 2006
- Hiroshi Akiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical disk apparatus compatible with different types of mediums
- Publication number 20060221799
- Publication date Oct 5, 2006
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Application
Aberration adjustment device, method thereof, optical pickup, and o...
- Publication number 20050063260
- Publication date Mar 24, 2005
- Hiroshi Akiyama
- G11 - INFORMATION STORAGE
Information Patent Application
Optical pickup apparatus and optical disk drive apparatus
- Publication number 20040184383
- Publication date Sep 23, 2004
- Masahiko Nakayama
- G11 - INFORMATION STORAGE
Information Patent Application
Noise level detecting circuit
- Publication number 20040032532
- Publication date Feb 19, 2004
- Hiroshi Akiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical-pickup device and tilt-detecting method thereof
- Publication number 20030151999
- Publication date Aug 14, 2003
- Hideaki Hirai
- G11 - INFORMATION STORAGE
Information Patent Application
Opitical pickup apparatus compatible with different types of optica...
- Publication number 20030048736
- Publication date Mar 13, 2003
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE
Information Patent Application
Optical disk apparatus compatible with different types of mediums
- Publication number 20010050892
- Publication date Dec 13, 2001
- Yoshitaka Takahashi
- G11 - INFORMATION STORAGE

Hiroshi AKIYAMA

Person

Patents Grantslast 30 patents

Coupling lens, illuminating device, and electronic device

Optical scan unit, image projector including the same, vehicle head...

Lighting device and projection image display unit

Optical pickup apparatus and optical disk drive apparatus

Optical disk apparatus compatible with different types of mediums a...

Aberration adjustment device, method thereof, optical pickup, and o...

Optical scanning device and image forming apparatus

Optical disk apparatus compatible with different types of mediums a...

Optical pickup apparatus

Optical pickup apparatus and optical disk drive apparatus

Optical pickup apparatus compatible with different types of optical...

Optical element, optical pickup unit, and optical disk drive unit

Optical-pickup device and tilt-detecting method thereof

Optical-pickup device and tilt-detecting method thereof

Optical pickup device applicable to two kinds of recording media wi...

Optical disk apparatus compatible with different types of mediums a...

Optical pickup device

Optical disk apparatus compatible with different types of mediums

Optical pick-up device for processing central and peripheral optica...

Optical pickup device for accessing each of optical disks of differ...

Optical pickup apparatus

Optical pickup device for accessing each of optical disks of differ...

Optical pickup apparatus

Infinitesimal displacement measuring apparatus and optical pick-up...

Optical pick-up device with a multifunctional prism

Patents Applicationslast 30 patents

COUPLING LENS, ILLUMINATING DEVICE, AND ELECTRONIC DEVICE

OPTICAL SCAN UNIT, IMAGE PROJECTOR INCLUDING THE SAME, VEHICLE HEAD...

PROJECTION-TYPE IMAGE DISPLAYING APPARATUS

LIGHTING DEVICE AND PROJECTION IMAGE DISPLAY UNIT

Optical pickup apparatus and optical disk drive apparatus

Optical disk apparatus compatible with different types of mediums a...

Optical scanning device and image forming apparatus

Optical disk apparatus compatible with different types of mediums

Aberration adjustment device, method thereof, optical pickup, and o...

Optical pickup apparatus and optical disk drive apparatus

Noise level detecting circuit

Optical-pickup device and tilt-detecting method thereof

Opitical pickup apparatus compatible with different types of optica...

Optical disk apparatus compatible with different types of mediums