ALEXANDRIA, Va., April 21 -- United States Patent no. 12,606,305, issued on April 21.

"Ultralight vent systems for aircraft fluid dispersion tanks" was invented by Victor D. Trotter (Fort Worth, Texas), Timothy L. Cook (Haltom City, Texas), Zachary A. Martin-Schoch (Fort Worth, Texas) and Martin P. Worden (Haltom City, Texas).

According to the abstract* released by the U.S. Patent & Trademark Office: "In the field of agriculture and aerial firefighting, some example vent systems for aircraft fluid dispersion tanks include a combination of features that greatly minimizes the vent system's weight. Some examples of the vent system include a generally planar valve plug rigidly attached to a flexurally rigid but axially extendible strut. An up...