Piccardi
{{PatentInfo |Inventor=Horace L. Blackman |Assignee=Pen Desk Set Company |Country=US |ApplicationNum=130116 |ApplicationDate=1926-08-19 |PatentNum=1892499 |PatentDate=1932-12-27 |PriorityDate=1926-08-19 |Titolo=Securing means for receiving receptacles ...