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{{PatentInfo |Inventor=Charles Dunn |Assignee=Charles Dunn |Country=US |ApplicationNum=267686 |ApplicationDate=1905-06-30 |PatentNum=821993 |PatentDate=1906-05-29 |PriorityDate=1905-06-30 |Titolo=Penholder |Marca=Dunn |Descrizione=Alimentatore }} ==Inf...