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Houilleres du Bassin du Nord et du Pas de Calais

Houilleres
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Patent No. Title Status Filing Date Grant Date Claims Actions
US3118859A Process for the manufacture of formaldehyde polymers Expired / Lapsed 1960-12-21 1964-01-21 2 Details
FR1319369A Windbreak device Expired / Lapsed 1962-01-17 1963-03-01 0 Details