ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,540,819, issued on Feb. 3, was assigned to LEICA GEOSYSTEMS AG (Heerbrugg, Switzerland).

"Surveying pole and secondary sensor unit having toroidal form" was invented by Heinz Bernhard (Berneck, Switzerland), Hannes Maar (Dornbirn, Austria), Phillip Lukas Rust (Herisau, Switzerland), Klaus Frombach (Tettnang, Germany), Markus Geser (Horn, Switzerland), Ismail Roman Celebi (St. Gallen, Switzerland) and Matteo Carrera (Speicher, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A surveying pole and to a secondary sensor unit which is attachable to the surveying pole. A reflector and/or GNSS receiver attachable to the surveying pole can be attached ...