Patents for Groton Iron Works


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Patents for Groton Iron Works
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	11,084	Jun. 13, 1854	L. Perrigo, I. Starks	Device for holding pieces in spoke-machines
	187,513	Feb. 20, 1877	E.E. Colby	Improvement in bridges