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Patents for Hamlet S. Briggs
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	RE9,468	Nov. 16, 1880	W. Gleason	Machine for Cutting the Teeth of Metal Gears
	RE9,469	Nov. 16, 1880	W. Gleason	Machine for Cutting Teeth of Wooden Gears

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