Patents for John William Caldwell


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Patents for John William Caldwell
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
940,426	Nov. 16, 1909	J.W. Caldwell	Auger-Bit	auger bits
996,612	Jul. 04, 1911	J.W. Caldwell	Auger-Bit	auger bits