ALEXANDRIA, Va., June 16 -- United States Patent no. 12,306,636, issued on May 20, was assigned to Advanlink Inc (Fremont, Calif.).

"Intelligent voice controlled pipeline and air duct video inspection robotic system" was invented by Fei Dai (Richmond Hill, Canada).

According to the abstract* released by the U.S. Patent & Trademark Office: "An intelligent voice-controlled pipeline and air duct video inspection robotic system comprises an image acquisition unit, a control unit, a voice control device, and an in-pipe crawling device. The image acquisition unit is positioned on the in-pipe crawling device, and the in-pipe crawling device is connected to the control unit through a cable. The in-pipe crawling device is configured to move in a p...