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| Number | Title | Issue Date |
| 4038650 | Fluid level detector and probe assembly A device for gauging level of a liquid within a container employing an elongated fibrous optic assembly which is connected at one end to a probe which is mounted within the container and at the other end to an electrical control device, the end of the fib... | 07/26/1977 |
| 4014010 | Fluid-dispensing apparatus having level control and alarm means The apparatus comprises a flexible tube through which fluid flows from a supply, and a opaque ball which is adjustably disposed within the tube. When fluid is first fed through the tube, an air bubble forms, and the location of this bubble is set by squee... | 03/22/1977 |
| 4008612 | Liquid quantity detecting device A liquid quantity detecting device comprises a liquid container, liquid circulating means disposed within the liquid container, and means for detecting bubbles created by the liquid circulating means when the liquid level has been lowered. Thus, decrease ... | 02/22/1977 |
| 3994175 | Device for detecting specific gravity and level of liquid A device for detecting the specific gravity and level of liquid in a container comprising a light source, a photoelectric transducer positioned in light receiving relationship with respect to the light source, a float which has a predetermined specific gr... | 11/30/1976 |
