| All Patents in class 451/287 |
Patents 1 -
14
of 14
      |
| Number | Date | Patentee | Title | Type |
| 282,049 | Jul. 31, 1883 | A. Campbell | Grinding Machine | stone dressing machines |
| 282,761 | Aug. 07, 1883 | J.T. Obenchain | Machine for Facing Millstones | miller |
| 493,294 | Mar. 14, 1893 | H.E. Procunier | Apparatus for Edging Metal Ribbons or Stripes | spring making machines |
| 1,084,628 | Jan. 20, 1914 | B.M. Hanson | Metal Reducing Machine | surface grinders |
| 1,392,325 | Oct. 04, 1921 | B.M. Hanson | Vertical Surface Grinding Machine | surface grinders |
| 1,424,764 | Aug. 08, 1922 | C. Knowles | Surface Grinder | surface grinders |
| 1,535,080 | Apr. 21, 1925 | H.K. Spencer | Means For Controlling Feeding Mechanisms | surface grinders |
| 1,548,562 | Aug. 04, 1925 | H.K. Spencer | Means For And Method Of Handling Work Pieces | magnetic chucks |
| 1,599,374 | Sep. 07, 1926 | H.F. Skillings | Grinding Machine | surface grinders |
| 1,628,618 | May 10, 1927 | H.K. Spencer | Means For Handling Articles | grinding attachments |
| 1,656,347 | Jan. 17, 1928 | J.A. Doane | Sizing Device for Surface Grinders | surface grinders |
| 2,105,872 | Jan. 18, 1938 | A.L. Warner | Grinding machine | sharpeners |
| 2,138,264 | Nov. 29, 1938 | A.L. Warner | Work holder for mower sections | |
| 2,751,722 | Jun. 26, 1956 | H.F. Skillings | Gauging Device For Surface Grinder | grinding attachments |
