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Patents for Norman Sperry
Patents 1 - 3 of 3
Number	Date	Patentee	Title	Type
371,387	Oct. 11, 1887	A.U. Smith	Countersink	countersinks
405,613	Jun. 18, 1889	N. Sperry	Package for Auger Bits	tool storage
762,099	Jun. 07, 1904	N. Sperry	Auger-Bit	auger bits

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