| All Patents in class 137/418 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 2,019,461 | Oct. 29, 1935 | P.S. Russel | Control Means | flow controls |
| 2,067,836 | Jan. 12, 1937 | A.k. Foulds | Control Means | industrial control apparatus |
| 2,133,226 | Oct. 11, 1938 | A.G. Hann | Control Device | flow controls |
| 2,139,616 | Dec. 06, 1938 | A.K. Foulds | Control Device | flow controls |
| 2,189,662 | Feb. 06, 1940 | A.K. Foulds | Liquid Level Control Means | liquid level controls |
| 2,234,088 | Mar. 04, 1941 | P.S. Russel | Control Device | flow controls |
| 2,404,853 | Jul. 30, 1946 | W.S. Landon | Fluid Control for Oil Burners | flow controls |
