ALEXANDRIA, Va., June 25 -- United States Patent no. 12,337,955, issued on June 24, was assigned to NIPPON TELEGRAPH AND TELEPHONE Corp. (Tokyo).
"Propeller guard" was invented by Daisuke Uchibori (Tokyo), Yujin Hamano (Tokyo), Kazuaki Watanabe (Tokyo), Masafumi Nakagawa (Tokyo) and Atsushi Aratake (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A propeller guard 10 includes an upper frame 12 provided on the uppermost surface of the propeller guard 10, a base frame 15 provided on the lowermost surface of the propeller guard, and a curved frame 18 that couples the upper frame 12 and the base frame 15 together and is curved outward."
The patent was filed on Sept. 30, 2020, under Application No. 18/028,7...