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2820609
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Patent number 2,820,609
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Issue date Jan 21, 1958
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B66 - HOISTING LIFTING HAULING
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2748878
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Patent number 2,748,878
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Issue date Jun 5, 1956
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2683318
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Patent number 2,683,318
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Issue date Jul 13, 1954
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2624961
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Patent number 2,624,961
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Issue date Jan 13, 1953
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2376181
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Patent number 2,376,181
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Issue date May 15, 1945
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2375233
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Patent number 2,375,233
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Issue date May 8, 1945
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B66 - HOISTING LIFTING HAULING
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2357511
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Patent number 2,357,511
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Issue date Sep 5, 1944
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2322998
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Patent number 2,322,998
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Issue date Jun 29, 1943
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2243306
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Patent number 2,243,306
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Issue date May 27, 1941
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2238346
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Patent number 2,238,346
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Issue date Apr 15, 1941
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2215025
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Patent number 2,215,025
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Issue date Sep 17, 1940
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2200447
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Patent number 2,200,447
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Issue date May 14, 1940
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2194945
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Patent number 2,194,945
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Issue date Mar 26, 1940
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2066456
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Patent number 2,066,456
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Issue date Jan 5, 1937
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1576865
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Patent number 1,576,865
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Issue date Mar 16, 1926
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING