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{{PatentInfo |Inventor=Guy Frédéric Ringonaud |Assignee=Guy Frédéric Ringonaud |Country=GB |ApplicationNum=28239/52 |ApplicationDate=1952-11-10 |PatentNum=732463 |PatentDate=1955-06-22 |PriorityDate=1951-07-27 |Titolo=Fountain pen |Marca=Platignum...