ALEXANDRIA, Va., June 2 -- United States Patent no. 12,646,213, issued on June 2, was assigned to Caterpillar Inc. (Peoria, Ill.).

"Techniques for extrinsic sensor calibration using mobile device" was invented by Jeffrey K. Berry (Clayton, N.C.), Nolan Graves (Peoria, Ill.) and Maxwell T. Eastepp (San Francisco).

According to the abstract* released by the U.S. Patent & Trademark Office: "Techniques are described for calibrating a coordinate frame of a remote sensing sensor of a perception system of a machine with respect to a coordinate frame of the machine. An application of a mobile device, such as a smartphone, a tablet computing device, or a laptop, or a web service detects a visual fiducial tag and a feature of the machine in an imag...