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Patents for Herbert F. Harden
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
725,141Apr. 14, 1903C.F. Laur, A.E. RobinsonSpeed Changing Mechanismmetal lathes
761,324May 31, 1904W.L. SchellenbachSpeed Changing Mechanismmetalworking speed changing mechanisms
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