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Coordinate input apparatus
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Patent number 5,253,187
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Issue date Oct 12, 1993
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Canon Kabushiki Kaisha
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Kiyoshi Kaneko
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G06 - COMPUTING CALCULATING COUNTING
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Coordinate input apparatus
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Patent number 5,239,138
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Issue date Aug 24, 1993
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Canon Kabushiki Kaisha
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Katsuyuki Kobayashi
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G06 - COMPUTING CALCULATING COUNTING
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Coordinates input apparatus
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Patent number 5,142,106
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Issue date Aug 25, 1992
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Canon Kabushiki Kaisha
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Yuichiro Yoshimura
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G06 - COMPUTING CALCULATING COUNTING
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Coordinate input apparatus
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Patent number 5,097,102
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Issue date Mar 17, 1992
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Canon Kabushiki Kaisha
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Yuichiro Yoshimura
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G06 - COMPUTING CALCULATING COUNTING
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Coordinate input apparatus
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Patent number 4,980,518
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Issue date Dec 25, 1990
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Canon Kabushiki Kaisha
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Katsuyuki Kobayashi
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G06 - COMPUTING CALCULATING COUNTING