Patents for Miles W. O'Brien, estate of (deceased)


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Patents for Miles W. O'Brien, estate of (deceased)
Patents 1 - 1 of 1
Number	Date	Patentee	Title	Type
2,138,117	Nov. 29, 1938	M.W. O'Brien, estate of (deceased), J.J. O'Brien	Belt Tighener	engine lathes