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| All Patents in class 137/115.14 | |||||
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| Number | Title | Classification(s) | |||
| 2,071,143 | Automatic Valve | 137/115.14, 137/508, 137/801 | |||
| 2,100,997 | Pressure Control Device | 137/115.14, 137/508, 137/510, 417/303 | |||
| 2,460,048 | Pressure Regulating Means | 137/115.14, 137/508, 137/510 | |||