ALEXANDRIA, Va., March 24 -- United States Patent no. 12,583,250, issued on March 24.

"Weighted chalk line device" was invented by Bret Hoplin (Powhatan, Va.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A weighted chalk line device may include a main body. A plurality of angular markings may be arranged on a top side of the main body at angularly-spaced-apart intervals about a central point, and may provide a visible indication of a respective plurality of angular positions about the central point. A bottom side of the main body may stably rest on a flat surface, and a first end of the string may be secured to the main body. The weight of the weighted chalk line device may maintain the first end of the str...