ALEXANDRIA, Va., May 19 -- United States Patent no. 12,633,238, issued on May 19, was assigned to LINKSIGN TECHNOLOGY Ltd. (New York).
"Advertising apparatus" was invented by Lihong Liang (Shenzhen, China).
According to the abstract* released by the U.S. Patent & Trademark Office: "An advertising apparatus compatible with multiple playback modes is provided, including a main body. The main body includes a display screen, a multi-function control module, a video box mounting component, a power supply board, a control box, and tempered glass. The tempered glass covers the display screen and an end face of the control box. The display screen is electrically connected to the multi-function control module and the power supply board. The video ...