Piccardi
{{PatentInfo |Inventor=Norman E. Weigel |Assignee=Norman E. Weigel |Country=US |ApplicationNum=415900 |ApplicationDate=1941-10-21 |PatentNum=2316478 |PatentDate=1943-04-13 |PriorityDate=1941-10-21 |Titolo=Pen point material |Marca=Unbranded |Descrizion...