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Patents for John Bain Armstrong
Patents 1 - 2 of 2
Number	Date	Patentee	Title	Type
CA-151,489	Nov. 04, 1913	J.B. Armstrong	Trap Valve	steam and water separators
1,080,507	Dec. 02, 1913	J.B. Armstrong	Trap-Valve Mechanism	steam and water separators

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