Piccardi
{{PatentInfo |Inventor=Wilbur Arthur Davis |Assignee=Wilbur Arthur Davis, George Walter Davis |Country=US |ApplicationNum=642609 |ApplicationDate=1946-01-22 |PatentNum=2531113 |PatentDate=1950-11-21 |PriorityDate=1946-01-22 |Titolo=Clip and cap structu...