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Laszlo Varkonyi
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Miskolc, HU
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last 30 patents
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Patent Grant
Catchwater drain, excavating structure and method of construction
Patent number
4,934,865
Issue date
Jun 19, 1990
Comporgan Rendszerhaz Kozos Vallalat
Laszlo Varkonyi
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING
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Patent Grant
Flexible layer structure for protecting earthworks, bed walls and f...
Patent number
4,804,293
Issue date
Feb 14, 1989
Comporgan Rendszerhaz K.V.
Laszlo Varkonyi
E02 - HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING