| All Patents in class 451/294 |
Patents 1 -
15
of 107
      |
| Number | Date | Patentee | Title | Type |
| 103,242 | May 17, 1870 | J. Shaughnessy | Improvement in Tool Grinding Attachment for Lathes | grinders |
| 103,474 | May 24, 1870 | V. Knecht | Improved pulley-sheave | industrial machine pulleys and belt drive mechanisms |
| 154,434 | Aug. 25, 1874 | W.F. Wolf | Improvement in molding-machines | molders |
| 183,061 | Oct. 10, 1876 | M.P. Locke | Adjustable Crank for Grindstones, &c. | human powered apparatus |
| 306,560 | Oct. 14, 1884 | F. Van De Water | Belt-tightener | industrial machine pulleys and belt drive mechanisms |
| 325,373 | Sep. 01, 1885 | E.J. Worcester | Drill-grinding attachment for drilling-machines | woodworking post drills |
| 348,143 | Aug. 24, 1886 | L. Schevell | Saw-sharpener | saw sharpening machines |
| 441,570 | Nov. 25, 1890 | R.B. Leighton | Lens Grinding Machine | material grinding machines |
| 457,079 | Aug. 04, 1891 | R. Dutton | Machine for grinding mower-knives | sharpeners |
| 492,451 | Feb. 28, 1893 | F.D. Winkley | Grinding apparatus | |
| 499,905 | Jun. 20, 1893 | W.B. Cannon | Grinding Attachment for Lathes | metal lathe accessories and attachments |
| 516,146 | Mar. 06, 1894 | C.A. Worden | Machine for sharpening razors, shears, &c. | |
| 583,402 | May 25, 1897 | M.O. Reeves | Speed-varying mechanism | industrial machine pulleys and belt drive mechanisms |
| 615,390 | Dec. 06, 1898 | O.W. Hult, C.A. Hult | Apparatus for Grinding Round Objects | cylindrical grinders |
| 651,839 | Jun. 19, 1900 | A.D. Erb | Sanding machine | sanding machines |
