Piccardi
{{PatentInfo |Inventor=Edward M. Slack |Assignee=Edward M. Slack |Country=US |ApplicationNum=638573 |ApplicationDate=1923-05-12 |PatentNum=1510613 |PatentDate=1924-10-07 |PriorityDate=1923-05-12 |Titolo=Combined pencil and fountain-pen construction |Ma...