| All Patents in class 451/395 |
Patents 1 -
15
of 42
      |
| Number | Date | Patentee | Title | Type |
| 818,518 | Apr. 24, 1906 | D.T. Clemons | Double-belt sander | belt sanders |
| 876,428 | Jan. 14, 1908 | J.G. Blessing | Fluid Pressure Operated Grinding Machine | sharpening machines |
| 1,276,167 | Aug. 20, 1918 | S.K. Brown | Surface Finishing Machine | |
| 1,280,284 | Oct. 01, 1918 | W.E. Nickerson | Blade Holding Mechanism for Blade Sharpening Machines | sharpening machines |
| 1,534,301 | Apr. 21, 1925 | P. Conradson | Grinding Machine | internal grinders |
| 1,534,302 | Apr. 21, 1925 | K.F. Gallimore, H.E. Kempton, P. Conradson | Grinding Machine | internal grinders |
| 1,575,968 | Mar. 09, 1926 | W.L. Bryant | Grinding machine | grinders |
| 1,718,554 | Jun. 25, 1929 | J. Greensmith | Hydraulic Grinder | surface grinders |
| 1,832,694 | Nov. 17, 1931 | L.F. Nenninger, H. Ernst | Auxiliary Manual Means for Actuating Hydraulic Motors | hydraulic apparatus |
| 1,838,028 | Dec. 22, 1931 | L.F. Nenninger, H. Ernst | Deferred Action Reversing Mechanism | hydraulic apparatus |
| 1,854,610 | Apr. 19, 1932 | J. de Koning | Work-feeding mechanism | |
| 1,877,500 | Sep. 13, 1932 | H.R. Isler, S. Einstein | Hydraulic Grinder | grinding machines |
| 1,893,068 | Jan. 03, 1933 | L.F. Nenninger, H. Ernst | Control for Hydraulic Systems | hydraulic apparatus |
| 1,912,413 | Jun. 06, 1933 | E.J. Svenson | Milling machine | |
| 1,938,762 | Dec. 12, 1933 | F.S. Haas | Grinding Machine | cylindrical grinders |
