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{{PatentInfo |Inventor=Theodor Kovacs |Assignee=The Firm Gunther Wagner |Country=US |ApplicationNum=473589 |ApplicationDate=1930-08-07 |PatentNum=1853731 |PatentDate=1932-04-12 |PriorityDate=1929-08-19 |Titolo=Reservoir pen |Marca=Pelikan |Descrizione=...