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Wristwatch movement
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Patent number 4,223,521
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Issue date Sep 23, 1980
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Citizen Watch Co., Ltd.
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Mituo Saitoh
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G04 - HOROLOGY
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3623315
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Issue date Nov 30, 1971
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G04 - HOROLOGY
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2872776
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Issue date Feb 10, 1959
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G04 - HOROLOGY
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2786327
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Patent number 2,786,327
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G04 - HOROLOGY
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2434390
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Patent number 2,434,390
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G04 - HOROLOGY
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2010218
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G04 - HOROLOGY
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1944654
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Patent number 1,944,654
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Issue date Jan 23, 1934
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G04 - HOROLOGY
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1738239
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Patent number 1,738,239
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Issue date Dec 3, 1929
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G04 - HOROLOGY
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1480511
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G04 - HOROLOGY
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1378408
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Patent number 1,378,408
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G04 - HOROLOGY