Piccardi
{{PatentInfo |Inventor=Max Knobel |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=722679 |ApplicationDate=1947-01-17 |PatentNum=2617387 |PatentDate=1952-11-11 |PriorityDate=1947-01-17 |Titolo=Writing instrument |Marca=Sheaffer |Descriz...