ALEXANDRIA, Va., April 7 -- United States Patent no. 12,597,441, issued on April 7, was assigned to SONY GROUP Corp. (Tokyo).

"Magnetic recording medium including fatty ester and fatty acid ester" was invented by Taikei Enomoto (Tokyo), Minoru Yamaga (Tokyo) and Futoshi Sasaki (Tokyo).

According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetic recording medium having a high recording density to be capable of preventing an increase in frictional force even in a case where many times of traveling is performed. A magnetic recording medium includes a magnetic layer containing a magnetic powder, the magnetic layer containing first particles having conductivity and second particles having a Mohs hardness of 7 or more...