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Patents for Ira Ingersoll
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,170,830	Feb. 08, 1916	W.F. Groene, R.K. Blond	Variable-speed mechanism
	1,203,751	Nov. 07, 1916	W.F. Groene, R.K. Le Blond	Gearing

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