ALEXANDRIA, Va., Nov. 3 -- United States Patent no. 12,781,907, issued on Nov. 3, was assigned to Startk Solutions LLC (Conroe, Tenn.).
"Pipeline passage indicator" was invented by Jarrod S. Robertson (Montgomery, Texas), Morgan M. Sledd (Conroe, Texas) and Andreas R. Segert (Conroe, Texas).
According to the abstract* released by the U.S. Patent & Trademark Office: "Pipeline passage indicators for signaling the presence of a pig in a pipeline are disclosed. A pipeline passage indicator may house an upper magnet and a lower magnet in separate bores within the pipeline passage indicator. A flag attached to an upper end of the pipeline passage indicator is moveable from a first position to a second position in response to upward movement of ...