Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Houilleres du Bassin du Nord et du Pas de Calais
Original Assignee
Houilleres du Bassin du Nord et du Pas de Calais
Filing date
Publication date
Application filed by Houilleres du Bassin du Nord et du Pas de CalaisfiledCriticalHouilleres du Bassin du Nord et du Pas de Calais
Application grantedgrantedCritical
Publication of AU222944B2publicationCriticalpatent/AU222944B2/en
Publication of AU2497957ApublicationCriticalpatent/AU2497957A/en