Piccardi
{{PatentInfo |Inventor=William A. Houston |Assignee=William A. Houston |Country=US |ApplicationNum=600608 |ApplicationDate=1911-01-03 |PatentNum=999648 |PatentDate=1911-08-01 |PriorityDate=1911-01-03 |Titolo=Fountain-pen |Marca=Houston Fountain Pen |De...