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.)
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 filedfiledCritical
Application grantedgrantedCritical
Publication of FR556028ApublicationCriticalpatent/FR556028A/fr
Perfectionnements aux disques à tailler et polir les pierres précieuses, aux pierres à aiguiser ou repasser, ou autres outils ayant une face active abrasive, et à la fabrication de ces outils