Piccardi
{{PatentInfo |Inventor=William H. Lindemon |Assignee=W. A. Sheaffer Pen Company |Country=US |ApplicationNum=537595 |ApplicationDate=1931-05-15 |PatentNum=1872151 |PatentDate=1932-08-16 |PriorityDate=1931-05-15 |Titolo=Tip for mechanical pencils |Marca=...