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Patents for Thorvald F. Hammer
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	305,305	Sep. 16, 1884	J.F. Nettleton, T.F. Hammer	Metallic Can
	321,023	Jun. 30, 1885	T.F. Hammer	Screw Tapping Machine

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