| All Patents in class 81/20 |
Patents 1 -
15
of 75
      |
| Number | Date | Patentee | Title | Type |
| 8,260X | Jun. 14, 1834 | J. Sharp | Forge Arm Hammer | blacksmith |
| 21,823 | Oct. 19, 1858 | R. Dawes | Hammer-Head | hammers |
| 36,829 | Nov. 04, 1862 | G.W. Schramm, R. Boeklen | Improvement in Hammers | hammers |
| 46,574 | Feb. 28, 1865 | J.O. Montignani | Carpenter's Adze Hammer | framing hammers |
| 64,247 | Apr. 30, 1867 | J.B. Oky | Combined Stove Cover Lifter, Hammer &c. | combination tools |
| 64,662 | May 14, 1867 | W.D. Gold | Combined Hammer, Screw-Driver and Wrench | combination tools |
| 66,298 | Jul. 02, 1867 | H. Cheney | Improvement in the Construction of Hammers | hammers |
| 66,781 | Jul. 16, 1867 | R. Black | Improved Hammer Head | hammers |
| 83,463 | Oct. 27, 1868 | T.S. Coffin | Improved Hammer | framing hammers |
| RE3,308 | Feb. 23, 1869 | T.A. Conklin | Improvement in Tack Hammers | tack hammers |
| 96,061 | Oct. 19, 1869 | J.W. Warner | Improvement in Lasting-Hammer | hammers |
| 102,677 | May 03, 1870 | G.W. Gregory | Improvement in Combination-Tool | combination tools |
| 103,660 | May 31, 1870 | O. Rock | Improved Shoemaker's Hammer | hammers |
| 115,008 | May 16, 1871 | G.M. Young | Improvement in Hammers | |
| 128,463 | Jul. 02, 1872 | A. Clarke, A. Clarke | Improvement in Shoe-Makers' Hammers | cobbler |
