Piccardi
{{PatentInfo |Inventor=William W. Stewart |Assignee=William W. Stewart |Country=US |ApplicationNum=222959 |ApplicationDate=1879-06-11 |PatentNum=222959 |PatentDate=1879-12-23 |PriorityDate=1879-06-11 |Titolo=Improvement in fountain-pens |Marca=Swan |De...