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Reflecting type optical system
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Patent number 6,785,060
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Issue date Aug 31, 2004
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Canon Kabushiki Kaisha
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Kenichi Kimura
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Reflecting type of zoom lens
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Patent number 6,639,729
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Issue date Oct 28, 2003
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Canon Kabushiki Kaisha
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Tsunefumi Tanaka
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Reflecting type of zoom lens
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Patent number 6,636,360
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Issue date Oct 21, 2003
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Canon Kabushiki Kaisha
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Tsunefumi Tanaka
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H04 - ELECTRIC COMMUNICATION TECHNIQUE
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Optical apparatus
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Patent number 5,847,887
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Issue date Dec 8, 1998
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Ohtsuka Patent Office
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Shigeo Ogura
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G02 - OPTICS
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Optical apparatus
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Patent number 5,825,560
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Issue date Oct 20, 1998
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Canon Kabushiki Xaisha
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Shigeo Ogura
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G02 - OPTICS