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Overpressure indicator
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Patent number 10,466,128
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Issue date Nov 5, 2019
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Dropsa S.p.A.
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Walter Divisi
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G01 - MEASURING TESTING
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3686951
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Patent number 3,686,951
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Issue date Aug 29, 1972
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G01 - MEASURING TESTING
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2909928
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Patent number 2,909,928
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Issue date Oct 27, 1959
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G01 - MEASURING TESTING
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2664750
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Patent number 2,664,750
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Issue date Jan 5, 1954
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G01 - MEASURING TESTING
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2372864
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Patent number 2,372,864
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Issue date Apr 3, 1945
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G01 - MEASURING TESTING
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2312787
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Patent number 2,312,787
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Issue date Mar 2, 1943
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G01 - MEASURING TESTING
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2252874
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Patent number 2,252,874
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Issue date Aug 19, 1941
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G01 - MEASURING TESTING
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1921001
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Patent number 1,921,001
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Issue date Aug 8, 1933
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G01 - MEASURING TESTING
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1861999
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Patent number 1,861,999
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Issue date Jun 7, 1932
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E21 - EARTH DRILLING MINING
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1613582
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Patent number 1,613,582
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Issue date Jan 4, 1927
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G01 - MEASURING TESTING
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1590919
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Patent number 1,590,919
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Issue date Jun 29, 1926
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G01 - MEASURING TESTING
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1468383
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Patent number 1,468,383
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Issue date Sep 18, 1923
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G01 - MEASURING TESTING