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Patents for Alfred J. O'Brien
Patents 1 - 4 of 4
Picture	Number	Date	Patentee	Title
	556,433	Mar. 17, 1896	E.B. Newnam	Foot Vise
	563,217	Jun. 30, 1896	H. Bolthoff	Ore-feeder for stamp-mills
	568,832	Oct. 06, 1896	H. Bolthoff	Hoisting-machine
	582,616	May 18, 1897	H. Bolthoff	Hoisting-machine

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