ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,447,387, issued on Oct. 21.
"Ball detection device" was invented by Cheng-Yi Shie (Tainan, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A ball detection device contains a support rack, a target plate, a sensing module, and a control unit. The support rack includes a fixing portion. The target plate includes nine marking zones, and a respective one marking zone has a passing orifice. The sensing module includes multiple ultrasonic sensors corresponding to the nine marking zones of the target plate, and a respective one ultrasonic sensor is received in the fixing portion and corresponds to the passing orifice, such that when the respective one ul...