| All Patents in class 451/194 |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 5,658X | Oct. 10, 1829 | D. Curtis, L.B. Prindle | Rubbing down and polishing combs | polishing and buffing machinery |
| 425,186 | Apr. 08, 1890 | G.J. Ridley | Grinding-machine | sharpening machines |
| 631,842 | Aug. 29, 1899 | C.A. Worden | Sharpening-machine | sharpening apparatus |
| 654,215 | Jul. 24, 1900 | M.L. Worden, Administratrix, C.A. Worden, deceased (Estate of) | Sharpening Machine | sharpening machines |
| 799,442 | Sep. 12, 1905 | H.L. Bornman | Sanding-machine | sanding machines |
| 1,262,008 | Apr. 09, 1918 | F.E. Bonham | Razor Blade Sharpener | cutler |
| 1,264,930 | May 07, 1918 | L.R. Heim | Roll Grinding Machine | |
| 1,271,715 | Jul. 09, 1918 | S. Hanner | Razor Blade Sharpening Machine | cutler |
| 1,709,348 | Apr. 16, 1929 | L.R. Heim | Method and Apparatus for Producing Ground Articles | grinding machines |
| 1,729,780 | Oct. 01, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,733,086 | Oct. 22, 1929 | E. Sobolewski | Centerless Grinder | centerless grinders |
| 1,733,090 | Oct. 22, 1929 | H.W. Holmes | Centerless Grinder | grinding machines |
| 1,733,097 | Oct. 22, 1929 | H.W. Holmes | Centerless Grinding Machine | grinding machines |
| 1,737,852 | Dec. 03, 1929 | F.M. Kern | Centerless Grinding Machine | grinding machines |
| 1,794,975 | Mar. 03, 1931 | R. Mershon | Grinding Machine | grinding machines |
