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Varifocal optical element
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Patent number 4,872,743
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Issue date Oct 10, 1989
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Canon Kabushiki Kaisha
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Takeshi Baba
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G06 - COMPUTING CALCULATING COUNTING
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Light modulating device
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Patent number 4,848,879
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Issue date Jul 18, 1989
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Canon Kabushiki Kaisha
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Yukuo Nishimura
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G06 - COMPUTING CALCULATING COUNTING
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-
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Zoom lens
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Patent number 4,571,032
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Issue date Feb 18, 1986
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Canon Kabushiki Kaisha
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Atsushi Someya
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G02 - OPTICS
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-
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Zoom optical system
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Patent number 4,132,463
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Issue date Jan 2, 1979
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Canon Kabushiki Kaisha
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Keiichi Sakaguchi
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G02 - OPTICS