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Patents for Isaac B. Hartwell
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	681	Apr. 07, 1838	R. Daniels	Crosscut eclipse shearing-machine for shearing woolen cloths
	13,169	Jul. 03, 1855	I.B. Hartwell	Machine for cutting cavities spherical, ellipsoidal, &c.

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