ALEXANDRIA, Va., Sept. 8 -- United States Patent no. 12,728,971, issued on Sept. 8, was assigned to Pioneer Material Precision Tech Co. Ltd. (New Taipei City, Taiwan).
"Underwater device" was invented by Chih-Sheng Chen (New Taipei City, Taiwan) and Ching-Hung Liu (New Taipei City, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "An underwater device includes a main body and a center of gravity mechanism. The center of gravity mechanism is disposed in the main body. The center of gravity mechanism includes a fixing plate, a bracket, a first driving motor, two guiding rods, two linear bearings, a battery module and a transmission assembly. The bracket is fixed to the fixing plate. The first driving motor...