| All Patents in class 451/194 |
Patents 1 -
10
of 17
      |
| Picture | Number | Date | Patentee | Title |
 | 5,658X | Oct. 10, 1829 | D. Curtis, L.B. Prindle | Rubbing down and polishing combs |
 | 425,186 | Apr. 08, 1890 | G.J. Ridley | Grinding-machine |
 | 631,842 | Aug. 29, 1899 | C.A. Worden | Sharpening-machine |
| | 654,215 | Jul. 24, 1900 | M.L. Worden, Administratrix, C.A. Worden, deceased (Estate of) | Sharpening Machine |
| | 799,442 | Sep. 12, 1905 | H.L. Bornman | Sanding-machine |
| | 1,262,008 | Apr. 09, 1918 | F.E. Bonham | Razor Blade Sharpener |
| | 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine |
| | 1,271,715 | Jul. 09, 1918 | S. Hanner | Razor Blade Sharpening Machine |
| | 1,709,348 | Apr. 16, 1929 | L.R. Heim | Method and Apparatus for Producing Ground Articles |
| | 1,729,780 | Oct. 01, 1929 | H.W. Holmes | Centerless Grinding Machine |
