Piccardi
{{PatentInfo |Inventor=Walter E. Guyot |Assignee=The Parker Pen Company |Country=US |ApplicationNum=625917 |ApplicationDate=1923-03-17 |PatentNum=1492451 |PatentDate=1924-04-29 |PriorityDate=1923-03-17 |Titolo=Refill mechanism for fountain pens |Marca=...