ALEXANDRIA, Va., Aug. 20 -- United States Patent no. 12,390,691, issued on Aug. 19, was assigned to KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS (Dhahran, Saudi Arabia).

"Ball rebound feedback system" was invented by Martin Pacholek (Dhahran, Saudi Arabia), Khaled Saleh Al-Athel (Dhahran, Saudi Arabia) and Ammar Alzaydi (Dhahran, Saudi Arabia).

According to the abstract* released by the U.S. Patent & Trademark Office: "The system has a non-rebound substrate and a first frame disposed around a peripheral edge thereof. The system further has an array of sensors, a digital sensor interface, and a control unit. The array of sensors is disposed in a center portion of the first frame. The array of sensors has at least 9 accelerometers configu...