Piccardi
{{PatentInfo |Inventor=Charles N. Colstad |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=574355 |ApplicationDate=1945-01-24 |PatentNum=2473689 |PatentDate=1949-06-21 |PriorityDate=1945-01-24 |Titolo=Clip for writing instruments |Marca...