ALEXANDRIA, Va., June 25 -- United States Patent no. 12,339,153, issued on June 24, was assigned to Simmonds Precision Products Inc. (Vergennes, Vt.).
"Optical fabry-perot based liquid level sensors" was invented by David H. Crowne (Weybridge, Vt.).
According to the abstract* released by the U.S. Patent & Trademark Office: "An optical sensor includes an optic fiber optically coupled to a cavity. An optical path is defined from the fiber, across the cavity, and reflected back across the cavity back into the fiber. The cavity is an open cavity that is in fluid communication with an environment ambient to the cavity for detection of changes in index of refraction inside the cavity due to whether the environment ambient to the cavity is gaseo...