Patents for Etienne Challet


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Patents for Etienne Challet
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	1,005,883	Oct. 17, 1911	E. Challet, P. Roch	Instument for Making Micrometric Measurements
	1,351,941	Sep. 07, 1920	E. Challet	Sliding Calipers