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{{PatentInfo |Inventor=Felix Riesenberg |Assignee=Felix Riesenberg |Country=GB |ApplicationNum=218 |ApplicationDate=1911-01-04 |PatentNum=191100218 |PatentDate=1911-02-23 |PriorityDate=1910-01-24 |Titolo=Improvements in Fountain Pens |Marca=Unbranded ...