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Patents for Useful Machinery Co.
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	208,491	Oct. 01, 1878	J.W. Post	Gear Cutting Attachment for Lathes
	208,492	Oct. 01, 1878	J.W. Post	Key-Seat or Pinion Cutter

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