Patents for George Otis Gridley


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Patents for George Otis Gridley
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	904,866	Nov. 24, 1908	G.O. Gridley	Multi-spindle machine
	1,130,398	Mar. 02, 1915	G.O. Gridley	Screw-threading mechanism
	1,166,126	Dec. 28, 1915	G.O. Gridley	Metal-working machine
	1,187,618	Jun. 20, 1916	G.O. Gridley	Metal-turning tool