| All Patents in class 451/151 |
Patents 1 -
10
of 30
      |
| Picture | Number | Date | Patentee | Title |
| | 1,534,301 | Apr. 21, 1925 | P. Conradson | Grinding Machine |
 | 1,580,094 | Apr. 06, 1926 | A. White | Tool-operating machine |
| | 1,718,554 | Jun. 25, 1929 | J. Greensmith | Hydraulic Grinder |
| | 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool |
| | 1,909,767 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool |
| | 2,114,349 | Apr. 19, 1938 | A.M. Johnson | Honing machine |
| | 2,255,583 | Sep. 09, 1941 | C.O. Holland | Honing machine |
| | 2,270,590 | Jan. 20, 1942 | A.M. Johnson | Honing machine |
| | 2,271,768 | Feb. 03, 1942 | A.M. Johnson | Honing machine |
| | 2,294,184 | Aug. 25, 1942 | A.M. Johnson | Honing machine |
