| All Patents in class 409/305 |
Patents 1 -
10
of 16
      |
| 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 |
| | 50,997 | Nov. 14, 1865 | W. Weild | Machine for Making Fluted Rollers |
 | 150,918 | May 12, 1874 | A. Whitcomb | Improvement in machines for making eaves-troughs |
| | 259,043 | Jun. 06, 1882 | E. Reynolds | Machine for Cutting Spiral Grooves in Grinding Rolls |
| | 286,466 | Oct. 09, 1883 | F. Messer | Machine for Dressing Rollers for Grinding Mills |
| | 289,556 | Dec. 04, 1883 | E. Rein | Device for Grinding and Grooving Mill Rollers |
| | 328,075 | Oct. 13, 1885 | P.T. Smith | Machine for Grooving Grinding Cylinders |
| | 331,613 | Dec. 01, 1885 | W.H. Campbell, C.B. Campbell | Machine for Gooving Metal Rolls |
| | 334,262 | Jan. 12, 1886 | F. Messer | Machine for Dressing Grinding Rolls |
| | 369,239 | Aug. 30, 1887 | G.J. Fritz | Machine for Corrugating Metal Rollers |
