US Patent Issued to TDK on March 31 for "R-T-B based permanent magnet" (Japanese Inventor)

ALEXANDRIA, Va., March 31 -- United States Patent no. 12,592,330, issued on March 31, was assigned to TDK Corp. (Tokyo).

"R-T-B based permanent magnet" was invented by Atsushi Koda (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "An R-T-B based permanent magnet includes rare earth elements, transition metal elements, boron, and M. An amount of boron is within a range between 0.90 mass % or more and 1.00 mass % or less. An amount of carbon is within a range between 0 mass % or more and 0.10 mass % or less, an amount of oxygen is within a range between 0 mass % or more and 0.15 mass % or less, an amount of nitrogen is within a range between 0 mass % or more and 0.15 mass % or less, an amount of M is withi...