Sony Group Assigned Patent

Sony Group Corporation, Tokyo, Japan, has been assigned a patent (12293780) developed by Terakawa; Masaru, and Yamaga; Minoru, Tokyo, Japan, for “magnetic recording medium having a particular specific surface area, magnetic recording and reproducing apparatus, and magnetic recording medium cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided is a magnetic recording medium configured to achieve higher density recording. The magnetic recording medium has a tape-like shape, and includes: a base containing polyester as a main constituent; and a magnetic layer provided on the base, including a plurality of magnetic powders, and configured to record a data signal. An average thickness of the magnetic recording medium is 5.6 μm or less. An average thickness of the base is 4.2 μm or less. An average thickness of the magnetic layer is 90 nm or less. An average aspect ratio of the magnetic powders is 1.0 or greater and 3.0 or less. A coercivity in a perpendicular direction is 3000 oersted or less. A rate of a coercivity in a longitudinal direction to the coercivity in the perpendicular direction is 0.8 or less. The magnetic layer includes a lubricant. An entire BET specific surface area of the magnetic recording medium from which the lubricant has been removed is 2.5 m.sup.2/g or greater.”

The patent application was filed on 2019-10-31 (17/760571).