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Excavating method
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Patent number 6,219,945
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Issue date Apr 24, 2001
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Kabushiki Kaisha Kobe Seiko Sho
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Mituo Heishi
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Trench cleaning apparatus
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Patent number 6,058,631
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Issue date May 9, 2000
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Douglas Dean Crawford
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Trenching or cutting apparatus
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Patent number 5,813,151
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Issue date Sep 29, 1998
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Anthony Leon Stephens
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3818709
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Patent number 3,818,709
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Issue date Jun 25, 1974
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3749446
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Patent number 3,749,446
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Issue date Jul 31, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3603097
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Patent number 3,603,097
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Issue date Sep 7, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3603099
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Patent number 3,603,099
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Issue date Sep 7, 1971
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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2994974
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Patent number 2,994,974
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Issue date Aug 8, 1961
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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1866037
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Patent number 1,866,037
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Issue date Jul 5, 1932
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING