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Patents for Blase Walch
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
111,099	Jan. 17, 1871	B. Walch	Adjustable Spur Auger	adjustable drill bits
RE5,238	Jan. 14, 1873	B. Walch	Improvement in augers	adjustable drill bits

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