| All Patents in class 409/304 |
Patents 1 -
10
of 35
      |
| Picture | Number | Date | Patentee | Title |
| | 1,458 | Dec. 31, 1839 | T.J. Butler | Mode of Cutting Seats, Slots, or Grooves for the Reception of Keys in the Hubs and Axles of Car-Wheels and in other Machinery |
| | 72,218 | Dec. 17, 1867 | J.W. Moore | Slotting Machine |
| | 77,225 | Apr. 28, 1868 | R.S. Eddy, W.H. Smith | Shaping Key-Seats |
| | 131,293 | Sep. 10, 1872 | L.M. Mooney | Improvement in Key-Seat Cutters |
 | 141,049 | Jul. 22, 1873 | R. Harper | Metal Planing Machines |
| | 208,492 | Oct. 01, 1878 | J.W. Post | Key-Seat or Pinion Cutter |
| | 249,382 | Nov. 08, 1881 | C. Moore | Machine for Grooving Metal Rolls |
| | 256,165 | Apr. 11, 1882 | J.R. Reynolds | Machine for Cutting Grooves in Rolls |
 | 265,976 | Oct. 17, 1882 | W.T. Nicholson | Machine for Forming Teeth Upon File-Blanks |
 | 274,287 | Mar. 20, 1883 | W.P. Davis | Key Seat Cutting Machine |
