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2878484
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Patent number 2,878,484
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Issue date Mar 24, 1959
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E03 - WATER SUPPLY SEWERAGE
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1769485
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Patent number 1,769,485
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Issue date Jul 1, 1930
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E03 - WATER SUPPLY SEWERAGE
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1636402
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Patent number 1,636,402
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Issue date Jul 19, 1927
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E03 - WATER SUPPLY SEWERAGE
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Patent number 1,419,426
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Issue date Jun 13, 1922
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E03 - WATER SUPPLY SEWERAGE
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515886
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Patent number 515,886
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Issue date Mar 6, 1894
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E03 - WATER SUPPLY SEWERAGE
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516128
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Patent number 516,128
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Issue date Mar 6, 1894
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E03 - WATER SUPPLY SEWERAGE