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All Patents in class 72/439
Patents 1 - 15 of 69
First set of recordsNext set of recordsLast set of records
3,882Jan. 10, 1845G.E. SellersDrop Hammertrip and helve hammers
36,459Sep. 16, 1862W.F. Goulding, F. CheneyImprovement in Drop-Pressesdrop hammers
37,692Feb. 17, 1863B. HotchkissImprovement in drop-pressesdrop hammers
40,769Dec. 01, 1863S. RemingtonImprovement in Drop-Pressesdrop hammers
48,394Jun. 27, 1865M. HastingsImproved Gold-Beating Hammerdrop hammers
69,518Oct. 01, 1867W.H. WatersDrop Hammerdrop hammers
77,155Apr. 21, 1868J. WoolDrop Hammerdrop hammers
125,386Apr. 09, 1872T. GaillardImprovement in Drop Pressesdrop hammers
130,183Aug. 06, 1872J. BlackadderImprovement in Drop-Hammersdrop hammers
148,867Mar. 24, 1874L.L. WhitlockDrop-Hammersdrop hammers
149,277Mar. 31, 1874L. ChapmanDrop-Hammersdrop hammers
160,483Mar. 02, 1875N.C. StilesDrop Hammerdrop hammers
228,067May 25, 1880M. HasseDrop-Hammerdrop hammers
255,619Mar. 28, 1882C.A. HagueDrop Hammerdrop hammers
259,287Jun. 13, 1882A.R. ByrkettDrop Hammerdrop hammers
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