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Patents for D. A. Woodbury & Co.
Patents 1 - 2 of 2
Picture	Number	Date	Patentee	Title
	23,521	Apr. 05, 1859	D.A. Woodbury	Variable cut-off for steam-engines
	23,737	Apr. 19, 1859	D.A. Woodbury	Variable cut-off gear for steam-engines

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