ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,558,685, issued on Feb. 24, was assigned to Trustees of Tufts College (Medford, Mass.).

"Fluidic devices involving signal generation at converging liquid fronts" was invented by Daniel J. Wilson (Mapleville, R.I.) and Charles R. Mace (Winchester, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Articles and methods involving fluidic devices are generally provided. In some embodiments, a fluidic device comprises a first layer comprising first and second regions that are disconnected from each other in the first layer and a second layer comprising a channel in fluidic communication with the first and second regions. The device may also comprise a thir...