Sony Group Assigned Four Patents

Magnetic recording medium and cartridge
Sony Group Corporation, Tokyo, Japan, has been assigned a patent (12417784) developed by Yamaga; Minoru, Tokyo, Japan, for “systems and methods for real-time file storage and retrieval.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic recording medium is a tape-shaped magnetic recording medium and includes: a base; and a magnetic layer. An average thickness of the magnetic recording medium is 5.30 μm or less. The magnetic layer contains a chlorine atom and a nitrogen atom, an atomic concentration ratio (A2/A1) of a maximum chlorine atomic concentration A1 obtained by measuring a chlorine atomic concentration of the magnetic layer in a thickness direction of the magnetic layer and a maximum nitrogen atomic concentration A2 obtained by measuring a nitrogen atomic concentration of the magnetic layer in the thickness direction of the magnetic layer is 0.50 or more and 0.75 or less. An average value of a protruding peak height Rpk of a surface of the magnetic layer is 2.10 nm or less.”

The patent application was filed on 2023-03-07 (18/840356).

Magnetic head, servo pattern recording apparatus, tape drive device, method of producing a magnetic tape, and recording method
Sony Group Corporation, Tokyo, Japan, has been assigned a patent (12406691) developed by Morita; Hiroshi, Tokyo, Japan, for “magnetic head, servo pattern recording apparatus, tape drive device, method of producing a magnetic tape, and recording method.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic head according to an embodiment of the present technology includes: a recording surface that has a first region corresponding to a position where a magnetic gap is provided in a length direction, and a second region corresponding to a position where the magnetic gap is not provided in the length direction, a plurality of groove portions crossing from one end in a width direction orthogonal to the length direction to the other end in the width direction being provided in the second region, and records a signal on a magnetic tape with the magnetic gap.”

The patent application was filed on 2022-03-31 (18/284691).

Magnetic recording medium and cartridge
Sony Group Corporation, Tokyo, Japan, has been assigned a patent (12400682) developed by Sekiguchi; Noboru, and Yamaga; Minoru, Tokyo, Japan, for “magnetic recording medium and cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided is a magnetic recording medium capable of curbing deterioration in electromagnetic conversion characteristics. A magnetic recording medium with a tape shape includes a substrate that contains polyesters, an underlayer that is provided on the substrate, and a magnetic layer that is provided on the underlayer and contains a magnetic powder. The magnetic recording medium contains a lubricant. An average value of arithmetic average roughnesses Ra of a surface of the magnetic layer is 1.3 nm or less. In a case where an average value of peak half widths of a spacing increase region generated on an entrance side of a glass pseudo head which the magnetic recording medium enters when the magnetic recording medium is slid over the glass pseudo head is set as a spacing index SRL and an average value of peak half widths of a spacing increase region generated in the vicinity of an edge of the magnetic recording medium in a width direction when the magnetic recording medium is slid over the glass pseudo head is set as a spacing index SRT, the spacing index SRL is 35 μm or less and the spacing index SRT is 68 μm or less.”

The patent application was filed on 2022-03-31 (18/284685).

Servo pattern recording method, servo pattern recording apparatus, method of producing magnetic tape, magnetic tape, and tape cartridge
Sony Group Corporation, Tokyo, Japan, has been assigned a patent (12347470) developed by Morita; Hiroshi, and Anno; Kazuo, Tokyo, Japan, for “servo pattern recording method, servo pattern recording apparatus, method of producing magnetic tape, magnetic tape, and tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A servo pattern recording method according to an embodiment of the present technology is a method of recording a servo pattern in a plurality of servo bands arrayed at intervals in a width direction of a magnetic layer of a magnetic tape, including: causing the magnetic tape to travel with a predetermined tension; and recording a servo pattern in the plurality of servo bands at a second pitch narrower than a first pitch that is an arrangement interval of two servo read heads in a tape drive device that records data in the magnetic layer or reproduces data recorded in the magnetic layer.”

The patent application was filed on 2022-02-16 (18/281842).