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Patents for William G. Allen
Patents 1 - 4 of 4
First set of recordsLast set of records
NumberDatePatenteeTitleType
877,157Jan. 21, 1908W.G. AllenManufacture of wood-screwsscrews
928,489Jul. 20, 1909W.G. Allen, R.G. HenryScrew-thread-cutting mechanismscrew machines
960,244Jun. 07, 1910W.G. AllenManufacture of Screws
1,560,193Nov. 03, 1925W.G. AllenDrilling machinesdrill presses
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