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Patents for Adolph H. Hawkinson
Patents 1 - 3 of 3
First set of recordsLast set of records
NumberDatePatenteeTitleType
1,401,469Dec. 27, 1921A.H. HawkinsonChisel for hollow-chisel mortisermortise chisels
1,655,836Jan. 10, 1928A.H. HawkinsonSaw Toothed Wood Boring Bitdrill bits
1,725,515Aug. 20, 1929E.W. Peterson, A.H. HawkinsonMethod of sharpening hollow or mortiser chiselssharpening machines
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