| All Patents in class 451/374 |
Patents 1 -
15
of 74
      |
| Number | Date | Patentee | Title | Type |
| 79,213 | Jun. 23, 1868 | H. Disston | Improvement in Device for Holding Rotary Cutters while being Ground | tool making machines |
| 95,988 | Oct. 19, 1869 | A.G. Coes | Sharpening Machine | cutter grinding |
| 241,497 | May 17, 1881 | S. Lawton | Machine for Holding Milling Tools for Grinding | grinding attachments |
| 271,966 | Feb. 06, 1883 | C.V. Woerd | Apparatus for Grinding Lathe Cutters | tool grinders |
| 319,794 | Jun. 09, 1885 | M. Covel | Saw sharpening machine | saw sharpening machines |
| 326,889 | Sep. 22, 1885 | D. Slate | Gear-Cutter | gear making machines |
| 341,437 | May 04, 1886 | V.H. Ernst | Milling Machine | milling machines |
| 359,943 | Mar. 22, 1887 | G.H. Smith | Attachment for Grinding Machines | grinding attachments |
| 384,613 | Jun. 19, 1888 | C.S. Farrar | Machine for sharpening saws, &c. | saw sharpening machines |
| 400,660 | Apr. 02, 1889 | H.C. Gilbert | Machine for grinding Shimer-molding bits, &c. | sharpening machines |
| 403,712 | May 21, 1889 | O.A. Winter | Machine for grinding the cutters of wood-cutting machines | sharpening machines |
| 427,517 | May 06, 1890 | A. Krost | Matcher-head cutter-vise | sharpening machines |
| 439,154 | Oct. 28, 1890 | F. Holz | Cutter Grinder | milling machines |
| 548,051 | Oct. 15, 1895 | A. Hartley | Grinder | tool grinders |
| 587,537 | Aug. 03, 1897 | C.E. Van Norman | Combined lathe and milling-machine | metal lathes |
