| All Patents in class 451/18 |
Patents 1 -
15
of 21
      |
| Number | Date | Patentee | Title | Type |
| 591,357 | Oct. 05, 1897 | C.H. Norton | Micrometer Feed for Grinding or Other Machines | metalworking machine mechanisms |
| 654,314 | Jul. 24, 1900 | A.B. Landis | Grinding-machine | grinders |
| 732,184 | Jun. 30, 1903 | B.M. Hanson | Dimensioning apparatus | measuring tools |
| 781,434 | Jan. 31, 1905 | A.B. Landis | Automatic sizing mechanism for grinding-machines | grinders |
| 879,276 | Feb. 18, 1908 | A.B. Landis | Grinding-machine | grinders |
| 956,208 | Apr. 26, 1910 | E.F. Smith | Grinding-machine | surface grinders |
| RE13,892 | Mar. 16, 1915 | C.E. Van Norman | Machine for grinding bearing-races | grinding machines |
| 1,424,764 | Aug. 08, 1922 | C. Knowles | Surface Grinder | surface grinders |
| 1,722,691 | Jul. 30, 1929 | C.E. Van Norman | Grinding machine | grinders |
| 1,872,667 | Aug. 23, 1932 | W.J. Bryant | Work sizing | grinders |
| 1,874,583 | Aug. 30, 1932 | L.F. Nenninger | Grinding Machinery | grinding machines |
| 1,877,500 | Sep. 13, 1932 | H.R. Isler, S. Einstein | Hydraulic Grinder | grinding machines |
| 1,926,603 | Sep. 12, 1933 | B.F. Stowell | Automatic feed for grinding machines | grinders |
| 1,928,162 | Sep. 26, 1933 | H.H. Asbridge | Precision grinding or abrading machine | grinding machines |
| 1,938,760 | Dec. 12, 1933 | H. Fritschi | Grinding Machine | grinding machines |
