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.)
Charbonnages de France CDF
Original Assignee
Charbonnages de France CDF
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Charbonnages de France CDFfiledCriticalCharbonnages de France CDF
Priority to FR7429119ApriorityCriticalpatent/FR2283207A1/fr
Publication of FR2283207A1publicationCriticalpatent/FR2283207A1/fr
Application grantedgrantedCritical
Publication of FR2283207B1publicationCriticalpatent/FR2283207B1/fr
