ALEXANDRIA, Va., July 9 -- United States Patent no. 12,352,573, issued on July 8, was assigned to Robert Bosch GmbH (Stuttgart, Germany).

"Levelling laser and optical projection lens" was invented by Bernd Schmidtke (Leonberg, Germany), Derek Chan (Shatin, Hong Kong), Sudhir Kumar Neravati (Bidar, India), Louisa Zhang (DongGuan, China) and David Kapfenberger (Stuttgart, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A levelling laser for generating a laser projection line on a surface is disclosed. The levelling laser includes an optical projection lens with a three-dimensional lens surface. The projection lens can be described in a three-dimensional coordinates system having three axes, X, Y and Z, ...