Piccardi
{{PatentInfo |Inventor=Alvin M. Yocom |Assignee=Alvin M. Yocom |Country=US |ApplicationNum=433451 |ApplicationDate=1930-03-05 |PatentNum=1794939 |PatentDate=1931-03-03 |PriorityDate=1930-03-05 |Titolo=Attachment for fountain pens |Marca=Unbranded |Des...