ALEXANDRIA, Va., Dec. 2 -- United States Patent no. 12,489,871, issued on Dec. 2, was assigned to SeeScan Inc. (San Diego).

"Video inspection and camera head tracking systems and methods" was invented by Mark S. Olsson (La Jolla, Calif.), Michael J. Martin (San Diego) and Alexander L. Warren (Escondido, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Various systems and methods are disclosed for tracking a camera head deployed into a pipe or other cavity. The systems and methods may include inertial navigation sensors for generating inertial navigation data to direct a user towards a location where the signal emitted by a pipe Sonde may be found at startup or, when in use, the pipe Sonde signal has bee...