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{{PatentInfo |Inventor=John William Para |Assignee=David Kahn Inc |Country=US |ApplicationNum=386328 |ApplicationDate=1941-04-01 |PatentNum=2337343 |PatentDate=1943-12-21 |PriorityDate=1941-04-01 |Titolo=Pen |Marca=Wearever |Descrizione=Alimentatore }}...