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2347654
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Patent number 2,347,654
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Issue date May 2, 1944
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Patent number 2,127,348
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Issue date Aug 16, 1938
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1985359
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Patent number 1,985,359
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Issue date Dec 25, 1934
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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1640149
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Patent number 1,640,149
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Issue date Aug 23, 1927
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...