Patents for Alvin D. Porter


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Patents for Alvin D. Porter
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	411,055	Sep. 17, 1889	C.O. Porter, A.D. Porter	Saw-tooth swage
	882,122	Mar. 17, 1908	C.O. Porter, A.D. Porter	Cutter-guard for buzz-planers