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All Patents in class 72/434
Patents 1 - 5 of 5
First set of recordsLast set of records
NumberDatePatenteeTitleType
88,980Apr. 13, 1869T.T. ProsserImproved power-hammerdrop hammers
244,370Jul. 19, 1881A. BeaudryPower-hammerdrop hammers
657,114Sep. 04, 1900L.D. HowardPower-hammerblacksmith
709,577Sep. 23, 1902L.D. HowardDrop-hammerblacksmith
2,163,715Jun. 27, 1939F.P. StullMethod of and Tool for Shaping and Ironing Sheet Metalsheet metal
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