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.)
Perfectionnements apportés aux procédés pour transporter du charbon, sous la forme d'une suspension aqueuse, par des canalisations sur des longues distances