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Floor slab bridge structure
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Patent number 7,469,439
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Issue date Dec 30, 2008
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Asahi Engineering Co., Ltd.
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Mitsuhiro Tokuno
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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3871181
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Patent number 3,871,181
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Issue date Mar 18, 1975
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2405295
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Patent number 2,405,295
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Issue date Aug 6, 1946
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2337378
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Patent number 2,337,378
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Issue date Dec 21, 1943
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2194279
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Patent number 2,194,279
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Issue date Mar 19, 1940
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2057947
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Patent number 2,057,947
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Issue date Oct 20, 1936
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1751835
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Patent number 1,751,835
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Issue date Mar 25, 1930
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING