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2769301
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G04 - HOROLOGY
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2618117
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Patent number 2,618,117
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G04 - HOROLOGY
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2593685
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Patent number 2,593,685
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Issue date Apr 22, 1952
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G04 - HOROLOGY
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2593686
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G04 - HOROLOGY
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1794622
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G04 - HOROLOGY