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Patents for Robert Walker
Patents 1 - 3 of 3
Picture	Number	Date	Patentee	Title
	5,871X	Mar. 10, 1830	R. Walker	Shovel cutter plough
	7,009	Jan. 08, 1850	R. Walker, A. Welch	Machinery for dressing shingles
	CA-877	Mar. 16, 1871	R. Walker	Improvements on drilling and boring machines

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