Piccardi
{{PatentInfo |Inventor=Cyril George Barker |Assignee=The Wyvern Fountain Pen Co. |Country=GB |ApplicationNum=28909/47 |ApplicationDate=1947-10-29 |PatentNum=639958 |PatentDate=1950-07-12 |PriorityDate=1947-10-29 |Titolo=Improvements in fountain pens,...