Piccardi
{{PatentInfo |Inventor=Frederick R. Wittnebert, Clemens Sonntag |Assignee=The Parker Pen Company |Country=US |ApplicationNum=823484 |ApplicationDate=1959-06-29 |PatentNum=3087464 |PatentDate=1963-04-30 |PriorityDate=1959-06-29 |Titolo=Modular fountain ...