Piccardi
{{PatentInfo |Inventor=Wenzel Franz Brynda |Assignee=Wenzel Franz Brynda |Country=FR |ApplicationNum=605510 |ApplicationDate=1925-09-24 |PatentNum=605510 |PatentDate=1926-05-28 |PriorityDate=1925-01-30 |Titolo=Perfectionnements aux crayons porte-mines...