ALEXANDRIA, Va., July 23 -- United States Patent no. 12,367,904, issued on July 22, was assigned to Sony Group Corp. (Tokyo).
"Magnetic recording medium" was invented by Minoru Yamaga (Tokyo) and Futoshi Sasaki (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetic recording medium is provided and including a magnetic layer containing magnetic powders, in which, the magnetic layer contains first particles having conductivity and second particles of which Mohs hardness is 7 or more, protrusions are formed on a surface of the magnetic layer side in accordance with the first particles and the second particles, a ratio (H1/H2) of an average height (H1) of protrusions formed in accordance with the first...