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Jan DE Koning
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Amsterdam, NL
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last 30 patents
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Patent Grant
Method and apparatus for dredging
Patent number
4,177,585
Issue date
Dec 11, 1979
Ballast-Nedam Groep N.V., Amsterdamse Ballast Bagger en Grond (Amsterdam Ball...
Jan de Koning
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Suction dredger
Patent number
4,175,342
Issue date
Nov 27, 1979
Goyo Ballast Company Ltd.
Jan de Koning
B66 - HOISTING LIFTING HAULING
Information
Patent Grant
Suction dredger vessel and method of loading the hold of the same
Patent number
4,172,617
Issue date
Oct 30, 1979
Ingenieursbureau voor Systemem en Octrooien "Spanstaal" B.V.
Jan de Koning
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Flexible connections for suction dredger pipes
Patent number
4,123,860
Issue date
Nov 7, 1978
Ballast-Nedam Groep N.V.
Jan De Koning
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Shock absorbing system for suction dredgers
Patent number
4,123,859
Issue date
Nov 7, 1978
Ballast-Nedam Groep N.V.
Jan de Koning
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Suction dredge with swell compensating ladder mount
Patent number
4,084,334
Issue date
Apr 18, 1978
Ballast Nedam Groep N.V.
Tjako Aaldrik Wolters
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
Information
Patent Grant
Swingable water and slush tube assembly for suction dredgers
Patent number
4,083,133
Issue date
Apr 11, 1978
Ballast Nedam Groep N.V.
Cornelis Jan Ravesteyn
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING