Keijiro Sakamoto

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Osaka, JP

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Patents Grantslast 30 patents

Information Patent Grant
Color image reading lens system
- Patent number 6,285,507
- Issue date Sep 4, 2001
- Minolta Co., Ltd.
- Keijiro Sakamoto
- G02 - OPTICS
Information Patent Grant
Zoom lens system
- Patent number 6,275,342
- Issue date Aug 14, 2001
- Minolta Co., Ltd.
- Keijiro Sakamoto
- G02 - OPTICS
Information Patent Grant
Zoom lens system
- Patent number 6,172,818
- Issue date Jan 9, 2001
- Minolta Co., Ltd.
- Keijiro Sakamoto
- G02 - OPTICS
Information Patent Grant
Gradient index lens system
- Patent number 5,623,370
- Issue date Apr 22, 1997
- Minolta Camera Kabushiki Kaisha
- Toshihiko Ueda
- G02 - OPTICS
Information Patent Grant
Finite conjugate distance zoom lens system
- Patent number 5,602,680
- Issue date Feb 11, 1997
- Minolta Co., Ltd.
- Keijiro Sakamoto
- G02 - OPTICS
Information Patent Grant
Transmission viewing screen of image projector apparatus
- Patent number 4,880,292
- Issue date Nov 14, 1989
- Minolta Camera Kabushiki Kaisha
- Hitoshi Kageyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Focusing device for use in optical apparatuses
- Patent number 4,789,880
- Issue date Dec 6, 1988
- Minolta Camera Kabushiki Kaisha
- Shinichi Mori
- G02 - OPTICS