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{{PatentInfo |Inventor=Thor Gustaf Thornblad |Assignee=Thor Gustaf Thornblad |Country=US |ApplicationNum=72621 |ApplicationDate=1925-12-02 |PatentNum=1649142 |PatentDate=1927-11-15 |PriorityDate=1925-07-27 |Titolo=Mechanical date indicator |Marca=Unbr...