| All Patents in class 451/151 |
Patents 1 -
15
of 29
      |
| Number | Date | Patentee | Title | Type |
| 1,534,301 | Apr. 21, 1925 | P. Conradson | Grinding Machine | internal grinders |
| 1,580,094 | Apr. 06, 1926 | A. White | Tool-operating machine | mortising machines |
| 1,718,554 | Jun. 25, 1929 | J. Greensmith | Hydraulic Grinder | surface grinders |
| 1,909,766 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 1,909,767 | May 16, 1933 | W.M. Fairbairn, A.M. Johnson | Machine tool | tapping machines |
| 2,114,349 | Apr. 19, 1938 | A.M. Johnson | Honing machine | honing machines |
| 2,255,583 | Sep. 09, 1941 | C.O. Holland | Honing machine | honing machines |
| 2,270,590 | Jan. 20, 1942 | A.M. Johnson | Honing machine | honing machines |
| 2,271,768 | Feb. 03, 1942 | A.M. Johnson | Honing machine | honing machines |
| 2,294,184 | Aug. 25, 1942 | A.M. Johnson | Honing machine | honing machines |
| 2,315,104 | Mar. 30, 1943 | W.G. Baldenhofer | Inclinable grinder spindle | surface grinders |
| 2,322,346 | Jun. 22, 1943 | H.J. Caldwell | Honing machine | honing machines |
| 2,343,275 | Mar. 07, 1944 | H.J. Caldwell, E.Y. Seborg | Honing machine | honing machines |
| 2,345,581 | Apr. 04, 1944 | H.J. Caldwell | Machine tool | |
| 2,377,310 | Jun. 05, 1945 | H.J. Caldwell, E.Y. Seborg | Control mechanism for honing machines | honing machines |
