| All Patents in class 137/400 |
Patents 1 -
15
of 17
      |
| Number | Date | Patentee | Title | Type |
| 2,067,836 | Jan. 12, 1937 | A.k. Foulds | Control Means | industrial control apparatus |
| 2,091,228 | Aug. 24, 1937 | A.G. Hann | Control Device | flow controls |
| 2,110,100 | Mar. 01, 1938 | A. Von Wangenheim | Gravity Feed Control | flow controls |
| 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 |
| 2,197,262 | Apr. 16, 1940 | P.S. Russel | Control Device | flow controls |
| 2,228,037 | Jan. 07, 1941 | P.S. Russel | Fuel Controlling Apparatus | flow controls |
| 2,234,088 | Mar. 04, 1941 | P.S. Russel | Control Device | flow controls |
| 2,317,556 | Apr. 27, 1943 | P.S. Russel | Liquid Level Controlling Means | liquid level controls |
| 2,387,858 | Oct. 30, 1945 | P.S. Russel | Liquid Level Controlling Means | liquid level controls |
| 2,404,853 | Jul. 30, 1946 | W.S. Landon | Fluid Control for Oil Burners | flow controls |
| 2,427,059 | Sep. 09, 1947 | W.S. Landon | Flow Control Means | flow controls |
| 2,493,297 | Jan. 03, 1950 | W.S. Landon | Orifice Cleaning Means | pipe and orifice cleaners |
| 2,494,395 | Jan. 10, 1950 | W.S. Landon | Magnetically Operated Safety Valve Closing Device | flow controls |
| 2,497,223 | Feb. 14, 1950 | W.S. Landon | Orifice Cleaning Means | pipe and orifice cleaners |
