Ikuya Tsurukawa

Person

Ohta-ku, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Lens barrel, camera, portable information terminal device, and imag...
- Patent number 7,744,294
- Issue date Jun 29, 2010
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DC motor
- Patent number 7,307,368
- Issue date Dec 11, 2007
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Lens barrel
- Patent number 7,259,923
- Issue date Aug 21, 2007
- Ricoh Company, Ltd.
- Katsuhiko Nuno
- G02 - OPTICS
Information Patent Grant
Resilient contact structure with bypass wire and camera having such...
- Patent number 7,048,574
- Issue date May 23, 2006
- Ricoh Company, Ltd.
- Junichi Shinohara
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
DC motor rotation control apparatus
- Patent number 6,628,893
- Issue date Sep 30, 2003
- Ricoh Company, Ltd.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
DC motor rotation detecting apparatus and DC motor rotation control...
- Patent number 6,617,816
- Issue date Sep 9, 2003
- Ricoh Company, Ltd.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
DC motor rotation detecting apparatus and DC motor rotation control...
- Patent number 6,570,350
- Issue date May 27, 2003
- Ricoh Company, Ltd.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Zoom lens device of two-lens group structure and driving device of...
- Patent number 5,392,159
- Issue date Feb 21, 1995
- Ricoh Company, Ltd.
- Saburo Sasaki
- G02 - OPTICS
Information Patent Grant
Focus state detection device
- Patent number 5,293,034
- Issue date Mar 8, 1994
- Ricoh Company, Ltd.
- Yoshimi Ohno
- G02 - OPTICS
Information Patent Grant
Zoom lens apparatus of two-lens group structure
- Patent number 5,267,085
- Issue date Nov 30, 1993
- Ricoh Company, Ltd.
- Saburo Sasaki
- G02 - OPTICS
Information Patent Grant
Apparatus for driving varifocal lens
- Patent number 5,146,254
- Issue date Sep 8, 1992
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- G02 - OPTICS
Information Patent Grant
Apparatus for preventing static electricity of plastic lens
- Patent number 4,985,719
- Issue date Jan 15, 1991
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- G02 - OPTICS
Information Patent Grant
Drive device for a varifocal lens system
- Patent number 4,950,061
- Issue date Aug 21, 1990
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- G02 - OPTICS
Information Patent Grant
Varifocal camera
- Patent number 4,847,648
- Issue date Jul 11, 1989
- Ricoh Company, Ltd.
- Kunihisa Yamaguchi
- G02 - OPTICS
Information Patent Grant
Finder switching apparatus for camera
- Patent number 4,831,399
- Issue date May 16, 1989
- Ricoh Company, Ltd.
- Ikuya Tsurukawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Single lens reflex camera
- Patent number 4,605,295
- Issue date Aug 12, 1986
- Ricoh Company, Ltd.
- Yoshimi Ohno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Auto-focusing method
- Patent number 4,561,747
- Issue date Dec 31, 1985
- Ricoh Company, Ltd.
- Yoshimi Ohno
- G02 - OPTICS
Information Patent Grant
Single lens reflex camera
- Patent number 4,498,754
- Issue date Feb 12, 1985
- Ricoh Company, Ltd.
- Yoshimi Ohno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY

Patents Applicationslast 30 patents

Information Patent Application
LENS BARREL
- Publication number 20080252999
- Publication date Oct 16, 2008
- Katsuhiko Nuno
- G02 - OPTICS
Information Patent Application
Lens barrel, camera, portable information terminal device, and imag...
- Publication number 20080080853
- Publication date Apr 3, 2008
- Ikuya Tsurukawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Lens barrel
- Publication number 20050068638
- Publication date Mar 31, 2005
- Katsuhiko Nuno
- G02 - OPTICS
Information Patent Application
Contact structure, an apparatus having the contact structure and im...
- Publication number 20050020126
- Publication date Jan 27, 2005
- Junichi Shinohara
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
DC motor
- Publication number 20020163259
- Publication date Nov 7, 2002
- RICOH COMPANY, LTD.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DC motor rotation detecting apparatus and DC motor rotation control...
- Publication number 20020044769
- Publication date Apr 18, 2002
- RICOH COMPANY, LTD.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DC motor
- Publication number 20020027395
- Publication date Mar 7, 2002
- RICOH COMPANY, LTD.
- Ikuya Tsurukawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DC motor rotation detecting apparatus and DC motor rotation control...
- Publication number 20010022505
- Publication date Sep 20, 2001
- Ricoh Company, Ltd.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
DC motor rotation control apparatus
- Publication number 20010019660
- Publication date Sep 6, 2001
- RICOH COMPANY, LTD.
- Yoshimi Ohno
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Ikuya Tsurukawa

Person

Patents Grantslast 30 patents

Lens barrel, camera, portable information terminal device, and imag...

DC motor

Lens barrel

Resilient contact structure with bypass wire and camera having such...

DC motor rotation control apparatus

DC motor rotation detecting apparatus and DC motor rotation control...

DC motor rotation detecting apparatus and DC motor rotation control...

Zoom lens device of two-lens group structure and driving device of...

Focus state detection device

Zoom lens apparatus of two-lens group structure

Apparatus for driving varifocal lens

Apparatus for preventing static electricity of plastic lens

Drive device for a varifocal lens system

Varifocal camera

Finder switching apparatus for camera

Single lens reflex camera

Auto-focusing method

Single lens reflex camera

Patents Applicationslast 30 patents

LENS BARREL

Lens barrel, camera, portable information terminal device, and imag...

Lens barrel

Contact structure, an apparatus having the contact structure and im...

DC motor

DC motor rotation detecting apparatus and DC motor rotation control...

DC motor

DC motor rotation detecting apparatus and DC motor rotation control...

DC motor rotation control apparatus