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Patents for Frederick L. Brown
Patents 1 - 2 of 2
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NumberDatePatenteeTitleType
909,748Jan. 12, 1909I.W. Sprink, F.L. BrownAutomatic Die Headtap and die holders
909,749Jan. 12, 1909I.W. Sprink, F.L. BrownAdjustable Collapsing Taptapping heads and chucks
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