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Materials dewatering unit
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Patent number 8,147,689
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Issue date Apr 3, 2012
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Lowell Cogar
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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-
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Horizontal extractor
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Patent number 4,221,764
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Issue date Sep 9, 1980
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Dravo Corporation
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Arthur F. Saxon
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Drainage device for particulate material
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Patent number 4,110,214
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Issue date Aug 29, 1978
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S.A. Block & Concrete (Proprietary) Limited
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Johann B. Pfeffer
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Drainage device for gravel and sand
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Patent number 4,024,066
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Issue date May 17, 1977
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Stichweh Verwaltungs-GmbH
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Lothar von Boehn
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3595400
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Patent number 3,595,400
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Issue date Jul 27, 1971
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2675128
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Patent number 2,675,128
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Issue date Apr 13, 1954
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2667881
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Patent number 2,667,881
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Issue date Feb 2, 1954
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2323920
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Patent number 2,323,920
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Issue date Jul 13, 1943
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2322415
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Patent number 2,322,415
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Issue date Jun 22, 1943
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2232618
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Patent number 2,232,618
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Issue date Feb 18, 1941
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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2075207
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Patent number 2,075,207
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Issue date Mar 30, 1937
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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1687863
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Patent number 1,687,863
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Issue date Oct 16, 1928
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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1668557
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Patent number 1,668,557
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Issue date May 8, 1928
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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1357499
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Patent number 1,357,499
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Issue date Nov 2, 1920
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING