| All Patents in class 137/510 |
Patents 1 -
10
of 11
      |
| Picture | Number | Date | Patentee | Title |
| | 1,786,402 | Dec. 23, 1930 | P.S. Russel | Regulator |
| | 1,814,443 | Jul. 14, 1931 | M.J. Goldberg | Fuel Injector for Oil Engines |
| | 1,843,068 | Jan. 26, 1932 | R. Gradhe, A. Von Wangenheim | Valve |
| | 1,888,866 | Nov. 22, 1932 | P.S. Russel | Control Means |
| | 1,946,882 | Feb. 13, 1934 | P.S. Russel | Valve |
 | 2,014,541 | Sep. 17, 1935 | F.W. Wappat | Pressure regulating valve |
| | 2,100,997 | Nov. 30, 1937 | P.S. Russel | Pressure Control Device |
| | 2,104,700 | Jan. 04, 1938 | P.S. Russel | Pressure Regulating Device |
| | 2,209,216 | Jul. 23, 1940 | D.D. Wile | Control Device |
| | 2,460,048 | Jan. 25, 1949 | A. Von Wangenheim | Pressure Regulating Means |
