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1970133
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Patent number 1,970,133
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Issue date Aug 14, 1934
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1925378
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Patent number 1,925,378
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Issue date Sep 5, 1933
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1871816
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Patent number 1,871,816
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Issue date Aug 16, 1932
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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1785356
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Patent number 1,785,356
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Issue date Dec 16, 1930
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...