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Patents for Joseph M. Hewlett
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
890,810	Jun. 16, 1908	H.R. Stacks	Friction-clutch	industrial machine clutches
924,397	Jun. 08, 1909	H.R. Stacks	Friction-clutch	industrial machine clutches

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