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Patents for Elijah Boyden
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
119,764	Oct. 10, 1871	C. Hodgkins	Improvement in water-rams	hydraulic pumps
133,368	Nov. 26, 1872	C. Hodgkins	Improvement in water-rams	hydraulic pumps

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