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Patents for Herbert H. Lewis
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	4,934,611	Jun. 19, 1990	H.H. Lewis	Rotary grinding apparatus
	4,934,614	Jun. 19, 1990	H.H. Lewis	Rotary grinding apparatus with secondary grinding chamber section
	4,946,109	Aug. 07, 1990	H.H. Lewis	Tooth assembly for rotary grinding apparatus

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