FujiFilm Assigned Fifteen Patents

Magnetic tape with particular refractive index characteristics, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,443,766) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape with particular refractive index characteristics, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided are a magnetic tape including: a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 .mu.m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value .DELTA.N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on December 26, 2019 (16/727,181).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,437,063) developed by Kasada, Norihito, Ozawa, Eiki, and Musha, Atsushi, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L.sub.99.9-L.sub.0.1 between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an absolute value .DELTA.N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 or more and 0.40 or less.”

The patent application was filed on January 30, 2020 (16/777,411).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,430,478) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided are a magnetic tape including: a non-magnetic support, a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support, and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5, and an isoelectric point of a surface zeta potential of the back coating layer is equal to or greater than 4.5, a magnetic tape cartridge, and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on December 26, 2019 (16/727,205).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,430,476) developed by Kasada, Norihito, Ozawa, Eiki, and Musha, Atsushi, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support and a magnetic layer including ferromagnetic powder and a binding agent, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference (L.sub.99.9-L.sub.0.1) between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an isoelectric point of a surface zeta potential of the magnetic layer is 3.8 or less.”

The patent application was filed on April 28, 2021 (17/242,798).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,430,475) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer has a servo pattern, and an absolute value .DELTA.N of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on September 25, 2020 (17/032,621).

Magnetic tape with particular refractive index characteristics, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,423,935) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape with particular refractive index characteristics, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided are a magnetic tape including: a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 .mu.m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value .DELTA.N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on May 24, 2021 (17/328,620).

Magnetic tape, cartridge, and magnetic recording and reproducing apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,423,934) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic recording and reproducing apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes: a non-magnetic support, and a magnetic layer including ferromagnetic powder, in which the ferromagnetic powder is ferromagnetic powder selected from the group consisting of hexagonal strontium ferrite powder and .epsilon.-iron oxide powder, and an amount of an edge weave of a tape edge on at least one side of the magnetic tape is 1.5 .mu.m or less.”

The patent application was filed on March 26, 2020 (16/831,158).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,423,932) developed by Ozawa, Eiki, Kasada, Norihito, and Musha, Atsushi, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and a difference between a spacing S.sub.after measured on a surface of the magnetic layer by an optical interferometry after methyl-ethyl-ketone cleaning and a spacing S.sub.before measured on the surface of the magnetic layer by an optical interferometry before methyl-ethyl-ketone cleaning is greater than 0 nm and 15.0 nm or less.”

The patent application was filed on August 11, 2021 (17/399,241).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,417,358) developed by Kasada, Norihito, Ozawa, Eiki, and Musha, Atsushi, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference L.sub.99.9-L.sub.0.1 between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an absolute value .DELTA.N of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 or more and 0.40 or less.”

The patent application was filed on May 26, 2021 (17/330,680).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,417,357) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which the magnetic layer has a servo pattern, and an absolute value .DELTA.N of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on July 26, 2019 (16/522,894).

Magnetic tape cartridge, recording device, method, reproducing system, and method
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,398,251) developed by Nishida, Kenji, Kanagawa, Japan, for “magnetic tape cartridge, recording device, recording method, reproducing system, and reproducing method.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic tape cartridge includes: a magnetic tape on which data is recorded, and a recording medium other than the magnetic tape, and on which a keyword for searching the data recorded on the magnetic tape is recorded.”

The patent application was filed on September 16, 2020 (17/022,113).

Noncontact communication medium, magnetic tape cartridge, operation method of noncontact communication medium, and storage medium
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,398,249) developed by Kataoka, Eiichiro, Kanagawa, Japan, for “noncontact communication medium, magnetic tape cartridge, operation method of noncontact communication medium, and storage medium.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A noncontact communication medium includes a coil and a processor mounted on a magnetic tape cartridge. The processor communicates with a communicatee by coupling between the coil and the communicatee by electromagnetic induction through an external magnetic field applied from the communicatee. The communicatee merges a command into the external magnetic field. The processor executes processing corresponding to the command merged into the external magnetic field. The processor changes a response time of the processor in response to the command, according to a characteristic of at least one of the magnetic tape cartridge, the noncontact communication medium, or the communicatee.”

The patent application was filed on February 1, 2021 (17/163,592).

Magnetic tape device, tape, and cartridge
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,393,503) developed by Kasada, Norihito, Kanagawa, Japan, for “magnetic tape device, magnetic tape, and magnetic tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic tape device, in which a magnetic tape is caused to run between a winding reel and a cartridge reel in a state where a tension is applied in a longitudinal direction of the magnetic tape and a maximum value of the tension is 0.50 N or more, and the magnetic tape after running in a state where the tension is applied is caused to be wound around the cartridge reel by applying a tension of 0.40 N or less in the longitudinal direction of the magnetic tape, and an adhesive strength of the magnetic layer of the magnetic tape is 1.0 N or more, and an adhesive strength of the back coating layer is 1.0 N or more.”

The patent application was filed on May 27, 2021 (17/331,649).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,380,357) developed by Ozawa, Eiki, Kasada, Norihito, and Musha, Atsushi, Minami-ashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support and a magnetic layer, in which an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and in which a difference between a spacing S.sub.after measured on a surface of the magnetic layer by an optical interferometry after ethanol cleaning and a spacing S.sub.before measured on the surface of the magnetic layer by an optical interferometry before ethanol cleaning is greater than 0 nm and 6.0 nm or less.”

The patent application was filed on May 25, 2021 (17/329,275).

Magnetic tape having characterized magnetic layer and magnetic recording and reproducing device
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11,373,680) developed by Iwamoto, Takahiro, Hosoda, Hidemasa, Kasada, Norihito, and Kurokawa, Takuto, Minami-ashigara, Japan, for “magnetic tape having characterized magnetic layer and magnetic recording and reproducing device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided are a magnetic tape comprising a magnetic layer containing a ferromagnetic powder and a binding agent on a non-magnetic support, in which the magnetic layer contains an oxide abrasive, an average particle diameter of the oxide abrasive obtained from a secondary ion image acquired by irradiating a surface of the magnetic layer with a focused ion beam is 0.04 .mu.m to 0.08 .mu.m, and an absolute value .DELTA.N of a difference between a refractive index Nxy measured with respect to an in-plane direction of the magnetic layer and a refractive index Nz measured with respect to a thickness direction of the magnetic layer is 0.25 to 0.40, and a magnetic recording and reproducing device including the magnetic tape.”

The patent application was filed on March 27, 2020 (16/832,284).