Kazumasa Yoshikawa

Person

Tochigi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Lens apparatus and image-taking apparatus including drive range lim...
- Patent number 7,808,547
- Issue date Oct 5, 2010
- Canon Kabushiki Kaisha
- Keisuke Hirai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Camera system and lens apparatus
- Patent number 7,755,695
- Issue date Jul 13, 2010
- Canon Kabushiki Kaisha
- Satoshi Natsume
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Switchover image taking apparatus
- Patent number 7,460,166
- Issue date Dec 2, 2008
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Relay unit
- Patent number 7,456,895
- Issue date Nov 25, 2008
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Lens apparatus allowing changing user settings to standard settings
- Patent number 7,388,615
- Issue date Jun 17, 2008
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical control system
- Patent number 7,280,148
- Issue date Oct 9, 2007
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Lens apparatus with changeable image-capturing function setting
- Patent number 7,265,788
- Issue date Sep 4, 2007
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical device, optical device driving unit, and camera system
- Patent number 7,158,179
- Issue date Jan 2, 2007
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- G02 - OPTICS
Information Patent Grant
Drive controller for lens apparatus
- Patent number 7,095,566
- Issue date Aug 22, 2006
- Canon Kabushiki Kaisha
- Noboru Suzuki
- G02 - OPTICS
Information Patent Grant
Optical apparatus, optical apparatus driving unit and camera system
- Patent number 7,079,182
- Issue date Jul 18, 2006
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- G02 - OPTICS
Information Patent Grant
Adapter device for connecting a photographic optical system to a ca...
- Patent number 6,717,618
- Issue date Apr 6, 2004
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical device, optical device driving unit, information write devi...
- Patent number 6,704,503
- Issue date Mar 9, 2004
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Optical driving unit, optical apparatus and camera system
- Patent number 6,701,073
- Issue date Mar 2, 2004
- Canon Kabushiki Kaisha
- Satoshi Natsume
- G02 - OPTICS
Information Patent Grant
Optical apparatus, optical apparatus driving unit and camera system
- Patent number 6,633,729
- Issue date Oct 14, 2003
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Rotation position control apparatus of rotary element of filter
- Patent number 6,605,916
- Issue date Aug 12, 2003
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical apparatus, optical apparatus driving unit and camera system
- Patent number 6,574,057
- Issue date Jun 3, 2003
- Canon Kabushiki Kaisha
- Susumu Fukita
- G02 - OPTICS
Information Patent Grant
Optical apparatus, optical element driving unit, and photographing...
- Patent number 6,522,838
- Issue date Feb 18, 2003
- Canon Kabushiki Kaisha
- Satoshi Natsume
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Drive controller for lens apparatus
- Publication number 20050254141
- Publication date Nov 17, 2005
- Canon Kabushiki Kaisha
- Noboru Suzuki
- G02 - OPTICS
Information Patent Application
Lens apparatus
- Publication number 20050225660
- Publication date Oct 13, 2005
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Lens apparatus
- Publication number 20050225661
- Publication date Oct 13, 2005
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Camera system and lens apparatus
- Publication number 20050094023
- Publication date May 5, 2005
- Satoshi Natsume
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Image taking apparatus
- Publication number 20040227842
- Publication date Nov 18, 2004
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical control system
- Publication number 20040212722
- Publication date Oct 28, 2004
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Relay unit
- Publication number 20040189859
- Publication date Sep 30, 2004
- Canon Kabushiki Kaisha
- Kazumasa Yoshikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical driving unit, optical apparatus and camera system
- Publication number 20030223739
- Publication date Dec 4, 2003
- Satoshi Natsume
- G02 - OPTICS
Information Patent Application
Optical apparatus, optical apparatus driving unit and camera system
- Publication number 20020001138
- Publication date Jan 3, 2002
- Susumu Fukita
- G02 - OPTICS
Information Patent Application
Optical device, optical device driving unit, information write devi...
- Publication number 20010055481
- Publication date Dec 27, 2001
- Kazumasa Yoshikawa
- G02 - OPTICS
Information Patent Application
Optical device, optical device driving unit, and camera system
- Publication number 20010040638
- Publication date Nov 15, 2001
- Kazumasa Yoshikawa
- G02 - OPTICS

Kazumasa Yoshikawa

Person

Patents Grantslast 30 patents

Lens apparatus and image-taking apparatus including drive range lim...

Camera system and lens apparatus

Switchover image taking apparatus

Relay unit

Lens apparatus allowing changing user settings to standard settings

Optical control system

Lens apparatus with changeable image-capturing function setting

Optical device, optical device driving unit, and camera system

Drive controller for lens apparatus

Optical apparatus, optical apparatus driving unit and camera system

Adapter device for connecting a photographic optical system to a ca...

Optical device, optical device driving unit, information write devi...

Optical driving unit, optical apparatus and camera system

Optical apparatus, optical apparatus driving unit and camera system

Rotation position control apparatus of rotary element of filter

Optical apparatus, optical apparatus driving unit and camera system

Optical apparatus, optical element driving unit, and photographing...

Patents Applicationslast 30 patents

Drive controller for lens apparatus

Lens apparatus

Lens apparatus

Camera system and lens apparatus

Image taking apparatus

Optical control system

Relay unit

Optical driving unit, optical apparatus and camera system

Optical apparatus, optical apparatus driving unit and camera system

Optical device, optical device driving unit, information write devi...

Optical device, optical device driving unit, and camera system