US Patent Issued to TDK on Sept. 9 for "Rare-earth-based magnet powder, bonded magnet, bonded magnet compound, sintered magnet, method of manufacturing rare-earth-based magnet powder, and method of manufacturing rare-earth based permanent magnet" (Japanese Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,412,687, issued on Sept. 9, was assigned to TDK Corp. (Tokyo).

"Rare-earth-based magnet powder, bonded magnet, bonded magnet compound, sintered magnet, method of manufacturing rare-earth-based magnet powder, and method of manufacturing rare-earth based permanent magnet" was invented by Ikuya Kokawa (Tokyo), Yoshinori Fujikawa (Tokyo), Kenichi Suzuki (Tokyo) and Yasushi Enokido (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "The rare-earth-based magnet powder has an average value of 0.65 or more as sphericity P1 defined by an equation (1) of P1=Ls/Ll. In the equation (1), Ll is a length or a long side of a rectangle that circumscribes the rare-ear...