Piccardi
{{PatentInfo |Inventor=William A. Houston |Assignee=William A. Houston |Country=US |ApplicationNum=359189 |ApplicationDate=1920-02-16 |PatentNum=D055515 |PatentDate=1920-06-22 |PriorityDate=1920-02-16 |Titolo=Design for a hook-pin |Marca=Houston Founta...