Kazumitsu Takezawa

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Shinagawa-Ku, Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Shading device and lens barrel
- Patent number 6,742,940
- Issue date Jun 1, 2004
- Nikon Corporation
- Norikatsu Konno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Lens barrel position detecting device and method
- Patent number 6,542,313
- Issue date Apr 1, 2003
- Nikon Corporation
- Hitoshi Imanari
- G02 - OPTICS
Information Patent Grant
Lens barrel having an iris stop unit
- Patent number 6,239,923
- Issue date May 29, 2001
- Nikon Corporation
- Kazumitsu Takezawa
- G02 - OPTICS
Information Patent Grant
Lens barrel
- Patent number 6,002,532
- Issue date Dec 14, 1999
- Nikon Corporation
- Kazumitsu Takezawa
- G02 - OPTICS
Information Patent Grant
Lens barrel with interlocking key
- Patent number 5,926,323
- Issue date Jul 20, 1999
- Nikon Corporation
- Kazumitsu Takezawa
- G02 - OPTICS
Information Patent Grant
Position detecting device
- Patent number 5,815,094
- Issue date Sep 29, 1998
- Nikon Corporation
- Hiroshi Okano
- G01 - MEASURING TESTING
Information Patent Grant
Lens barrel having a biasing member to prevent backlash between len...
- Patent number 5,627,683
- Issue date May 6, 1997
- Nikon Corporation
- Kazumitsu Takezawa
- G02 - OPTICS
Information Patent Grant
Lens assembly for automatic focusing cameras
- Patent number 5,041,855
- Issue date Aug 20, 1991
- Kazumitsu Takezawa
- G02 - OPTICS

Patents Applicationslast 30 patents

Information Patent Application
Shading device and lens barrel
- Publication number 20030091346
- Publication date May 15, 2003
- Nikon Corporation
- Norikatsu Konno
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Application
Lens barrel position detecting device and method
- Publication number 20020063971
- Publication date May 30, 2002
- Nikon Corporation
- Hitoshi Imanari
- G02 - OPTICS