Patents for John B. Armstrong


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Patents for John B. Armstrong
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
CA-10,883	Jan. 26, 1880	A.R. Woodyatt	Improvements in bending and shaping machines
CA-20,406	Oct. 22, 1884	A.R. Woodyatt	Tilt hammer	trip and helve hammers