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Pieter S. Heerema
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Kapellen, BE
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last 30 patents
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Patent Grant
Stabilizing system on a semi-submersible crane vessel
Patent number
4,231,313
Issue date
Nov 4, 1980
Varitrac AG
Pieter S. Heerema
B66 - HOISTING LIFTING HAULING
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Patent Grant
Stabilizing system for a crane vessel
Patent number
4,207,828
Issue date
Jun 17, 1980
Varitrac AG
Alexandre Horowitz
B66 - HOISTING LIFTING HAULING