| All Patents in class 137/421 |
Patents 1 -
7
of 7
      |
| Number | Date | Patentee | Title | Type |
| 632,724 | Sep. 12, 1899 | E.R. Klemm | Bottle-filling machine | |
| 2,091,228 | Aug. 24, 1937 | A.G. Hann | Control Device | flow controls |
| 2,133,226 | Oct. 11, 1938 | A.G. Hann | Control Device | flow controls |
| 2,228,037 | Jan. 07, 1941 | P.S. Russel | Fuel Controlling Apparatus | 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 |
| 2,591,581 | Apr. 01, 1952 | C.H. Millerwise | Trip and Reset Mechanism for Float Operated Liquid Fuel Controlling Valves | liquid level controls |
