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.)
Dr C Otto and Co GmbH
Directie van de Staatsmijnen in Limburg
Original Assignee
Dr C Otto and Co GmbH
Directie van de Staatsmijnen in Limburg
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 Dr C Otto and Co GmbH, Directie van de Staatsmijnen in LimburgfiledCriticalDr C Otto and Co GmbH
Application grantedgrantedCritical
Publication of FR52762EpublicationCriticalpatent/FR52762E/fr