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Patents for F. H. Sprague
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
89,240	Apr. 20, 1869	T.T. Prosser	Improvement in steam-generators	steam generators
89,241	Apr. 20, 1869	T.T. Prosser	Improvement in steam-generators	steam generators

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