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Patents for Isaac William Sprink
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
909,748	Jan. 12, 1909	I.W. Sprink, F.L. Brown	Automatic Die Head	tap and die holders
909,749	Jan. 12, 1909	I.W. Sprink, F.L. Brown	Adjustable Collapsing Tap	tapping heads and chucks

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