Piccardi
{{PatentInfo |Inventor=Archer Aston |Assignee=L. E. Waterman Company |Country=US |ApplicationNum=442468 |ApplicationDate=1921-02-04 |PatentNum=1381856 |PatentDate=1921-06-14 |PriorityDate=1921-02-04 |Titolo=Mechanically-operated advertising device |Mar...