Piccardi
{{PatentInfo |Inventor=Oswald H. Blackwood, Fred Pearson |Assignee=Oswald H. Blackwood, Fred Pearson |Country=US |ApplicationNum=240978 |ApplicationDate=1918-06-20 |PatentNum=1313056 |PatentDate=1919-08-12 |PriorityDate=1918-06-20 |Titolo=Fountain-pen...