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Pile casing
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Patent number 9,340,946
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Issue date May 17, 2016
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Grigorij Wagner
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E01 - CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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Expansible drive core
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Patent number 4,655,301
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Issue date Apr 7, 1987
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Funderingstechnieken Verstraeten B.V.
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Alexander J. Verstraeten
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Hydraulically operated mandrels
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Patent number 4,430,024
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Issue date Feb 7, 1984
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American Pile Driving Corporation
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Charles L. Guild
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Expansible mandrel
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Patent number 4,026,117
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Issue date May 31, 1977
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Charles L. Guild
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Pile driving mandrel
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Patent number 3,984,992
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Issue date Oct 12, 1976
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Stanley Merjan
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Installation of expanded base piles
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Patent number 3,971,227
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Issue date Jul 27, 1976
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Raymond International Inc.
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Augustus P. Godley
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3803854
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Patent number 3,803,854
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Issue date Apr 16, 1974
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3802207
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Patent number 3,802,207
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Issue date Apr 9, 1974
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3779026
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Patent number 3,779,026
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Issue date Dec 18, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3714787
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Patent number 3,714,787
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Issue date Feb 6, 1973
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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3693364
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Patent number 3,693,364
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Issue date Sep 26, 1972
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E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING