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All Patents in class 173/197
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
6,399	Apr. 24, 1849	C. Foss	Machine for making grindstones
643,083	Feb. 06, 1900	M.C. Bullock, deceased (Estate of), M.A. Bullock, Executrix	Thrust Register for Drilling Machines	drill press accessories

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