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of Nashua, New Hampshire, USA
Machine tool maker.
Born 25 September 1815, New Hampshire.
Died 23 October 1862.
John H. Gage was a machinist and manufacturer of machine tools in Nashua. He subsequently formed a partnership with David A. G. Warner and George H. Whitney, as Gage, Warner and Whitney.
A J. H. Gage metal planing machine is preserved at the Smithsonian. Photos and description here. The Smithsonian date it at c.1837, but Robert B. Gordon, in a masterly analysis of the machine, put the date between 1845 and 1851