| All Patents in class 451/387 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 409,337 | Aug. 20, 1889 | E.B. Rich | Machine for grinding knives and saws | sharpening machines |
| 465,478 | Dec. 22, 1891 | A. Johnston | Grinding Machine | sharpening apparatus |
| 630,325 | Aug. 08, 1899 | H.W. Cheney | Bevel-gear-generating machine | gear making machines |
| 953,031 | Mar. 29, 1910 | J. Hausman, J.C. Blevney | Grinding and polishing machine | sanding machines |
| 957,783 | May 10, 1910 | C.L. Libby | Tool-support for lathes | turret lathes |
| 1,666,500 | Apr. 17, 1928 | N.I. Lundberg | Metal Working Tool | grinders |
| 1,753,590 | Apr. 08, 1930 | F.K. Benedict | Workholder for bar-grinding machines | |
| 1,894,010 | Jan. 10, 1933 | H.E. Tautz | Work-holding means for gauges | tablesaw accessories |
| 1,979,140 | Oct. 30, 1934 | L.G. Casey | Cutting-off machine | |
| 2,069,097 | Jan. 26, 1937 | P.H. Root | Knife grinder | sharpening machines |
| 2,107,566 | Feb. 08, 1938 | R.D. Gardner | Abrasive-sawing machine | metal sawing machines |
| 2,111,299 | Mar. 15, 1938 | O.E. Robbins | Magnetic Sine Table | angle bars and angle plates |
| 2,214,166 | Sep. 10, 1940 | C.J. Hertlein | Dividing Head | indexers and dividers |
| 2,257,195 | Sep. 30, 1941 | J.D. Rovick | Internal Gear Finishing Machine | gear making machines |
| 2,314,312 | Mar. 16, 1943 | W.C. Knapp | Grinding method and apparatus | |
