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Micrometer
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Patent number 4,553,330
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Issue date Nov 19, 1985
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Mitutoyo Mfg. Co., Ltd.
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Mineo Yamauchi
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G01 - MEASURING TESTING
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Inner diameter micrometer
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Patent number D252501
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Issue date Jul 31, 1979
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Mitutoyo Mfg., Co., Ltd.
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Mineo Yamauchi
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D10 - Measuring, testing, or signalling instruments
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Hole gauge
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Patent number 4,136,456
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Issue date Jan 30, 1979
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Kabushiki Kaisha Mitutoyo Seisakusho
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Mineo Yamauchi
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G01 - MEASURING TESTING