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Patents for Francis Keyser
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	6,097	Feb. 06, 1849	S.A. Abbott, E. Elicott	Level-scale for canals, railroads, &c.
	82,131	Sep. 15, 1868	E.E. Lazell	Centering Device

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