ALEXANDRIA, Va., Oct. 28 -- United States Patent no. 12,453,904, issued on Oct. 28.
"Submersible propeller" was invented by Qun Lin (Shanghai).
According to the abstract* released by the U.S. Patent & Trademark Office: "A submersible propeller that includes a battery and propellers in which: the propellers include a left propeller and a right propeller; front portions of the left propeller and the right propeller are connected to a waist-wearing power supply battery through a power supply cable for the left propeller and a power supply cable for the right propeller respectively. Rear portions of the left propeller and the right propeller are connected to a left angle controller and a right angle controller through a connection cable for t...