Piccardi
{{PatentInfo |Inventor=Edward G. Knight |Assignee=Thomas De La Rue and Company |Country=GB |ApplicationNum=5458/39 |ApplicationDate=1939-02-18 |PatentNum=525411 |PatentDate=1940-08-28 |PriorityDate=1939-02-18 |Titolo=Improvements in stylographs |Marca=...