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2674224
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Patent number 2,674,224
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Issue date Apr 6, 1954
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1954315
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Patent number 1,954,315
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Issue date Apr 10, 1934
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1797350
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Patent number 1,797,350
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Issue date Mar 24, 1931
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1574238
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Patent number 1,574,238
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Issue date Feb 23, 1926
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1517052
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Patent number 1,517,052
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Issue date Nov 25, 1924
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1452376
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Patent number 1,452,376
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Issue date Apr 17, 1923
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1452374
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Patent number 1,452,374
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Issue date Apr 17, 1923
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1327627
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Patent number 1,327,627
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Issue date Jan 13, 1920
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