| All Patents in class 409/170 |
Patents 1 -
15
of 62
      |
| Number | Date | Patentee | Title | Type |
| 527,213 | Oct. 09, 1894 | E.J. McClellan | Milling Machine | milling machines |
| 876,428 | Jan. 14, 1908 | J.G. Blessing | Fluid Pressure Operated Grinding Machine | sharpening machines |
| 956,208 | Apr. 26, 1910 | E.F. Smith | Grinding-machine | surface grinders |
| 1,177,385 | Mar. 28, 1916 | C.M. Conradson | Hydraulic Variable Transmission | metalworking machine mechanisms |
| 1,207,535 | Dec. 05, 1916 | F.E. Gardner | Disk grinder | disk sanders |
| 1,740,744 | Dec. 24, 1929 | F.A. Parsons | Fluid Transmission and Control Means for Machine Tools | milling machines |
| 1,763,142 | Jun. 10, 1930 | W. Ernst | Hydraulic Press | hydraulic presses |
| 1,794,472 | Mar. 03, 1931 | F.H. Mussler | Hydraulic Change-Speed-Gear Mechanism | |
| 1,800,982 | Apr. 14, 1931 | E.C. Bullard, F.H. Mussler | Hydraulic Change-Speed Gear Mechanism | |
| 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 |
| 1,877,500 | Sep. 13, 1932 | H.R. Isler, S. Einstein | Hydraulic Grinder | grinding machines |
| 1,884,277 | Oct. 25, 1932 | B. Sassen | Self Regulating Hydraulic System | hydraulic apparatus |
| 1,893,068 | Jan. 03, 1933 | L.F. Nenninger, H. Ernst | Control for Hydraulic Systems | hydraulic apparatus |
| 1,897,032 | Feb. 14, 1933 | H. Ernst | Convertible Type Feed System | hydraulic apparatus |
