Patents by Inventor Kazutaka Yamashita
Kazutaka Yamashita has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8357189Abstract: A physiology enhancing device for improving physiological functions of a human body, etc., which comprises a heat generating element making use of chemical energy and a sheet interposed between the heat generating element and a body surface of a wearer, and which is designed to supply steam generated from the heat generating element while the device is applied to the body surface. The device exhibits steam generating capability for 2 hours or longer and, while applied to the body surface, raises the body surface temperature to a temperature from 38° C. to lower than 42° C. within one hour from the application. The sheet interposed between the heat generating element and the body surface preferably has a function of regulating air feed to the heat generating element and a function of transferring the heat of the physiology enhancing device to the body surface and preferably has a total thickness of 0.05 to 1.5 mm.Type: GrantFiled: March 3, 2006Date of Patent: January 22, 2013Assignee: Kao CorporationInventors: Toru Ugajin, Michihito Igaki, Kazutaka Yamashita, Katsutoshi Hara, Yoshinao Nagashima, Shuji Ishikawa, Ichiro Sakamoto
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Publication number: 20090062890Abstract: A physiology enhancing device for improving physiological functions of a human body, etc., which comprises a heat generating element making use of chemical energy and a sheet interposed between the heat generating element and a body surface of a wearer, and which is designed to supply steam generated from the heat generating element while the device is applied to the body surface. The device exhibits steam generating capability for 2 hours or longer and, while applied to the body surface, raises the body surface temperature to a temperature from 38° C. to lower than 42° C. within one hour from the application. The sheet interposed between the heat generating element and the body surface preferably has a function of regulating air feed to the heat generating element and a function of transferring the heat of the physiology enhancing device to the body surface and preferably has a total thickness of 0.05 to 1.5 mm.Type: ApplicationFiled: March 3, 2006Publication date: March 5, 2009Applicant: KAO CORPORATIONInventors: Toru Ugajin, Michihito Igaki, Kazutaka Yamashita, Katsutoshi Hara, Yoshinao Nagashima, Shuji Ishikawa, Ichiro Sakamoto
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Patent number: 6284361Abstract: A magnetic recording medium comprising a substrate having provided thereon at least one intermediate layer essentially containing nonmagnetic powder and a binder and further having thereon a magnetic layer as an upper layer which essentially contains ferromagnetic powder and a binder, wherein the nonmagnetic powder in the intermediate layer is mainly acicular, and the acicular nonmagnetic powder has a coefficient of orientation (&agr;) of 0 to 0.8 in the longitudinal direction in the surface thereof.Type: GrantFiled: October 27, 1998Date of Patent: September 4, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Hideyuki Kobayashi, Kazutaka Yamashita, Masayasu Sato
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Patent number: 6139937Abstract: A magnetic recording medium in which the bearing ratio Tp of the magnetic layer on a slice level at a depth of 45 nm from the highest peak of the surface profile measured with an atomic force microscope is 3% to 60%, and the difference .DELTA..mu. between the maximum frictional coefficient and the minimum frictional coefficient of the magnetic layer ranges from 0.1 to 0.0001 as measured under conditions of 5 mm.sup.2 in contact area, 2 g in weight of a measuring head, 0.04 to 0.2 N in load applied, 3 mm/sec in speed, and 140 mm in length of measurement.Type: GrantFiled: October 27, 1998Date of Patent: October 31, 2000Assignee: Kao CorporationInventors: Makoto Sato, Hideyuki Kobayashi, Kazutaka Yamashita
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Patent number: 6103340Abstract: A magnetic recording medium comprising a nonmagnetic substrate having provided thereon an intermediate layer consisting essentially of magnetic powder having a Mohs hardness of not less than 3 and an average particle size of not greater than 0.5 .mu.m and/or nonmagnetic powder having a Mohs hardness of not less than 3, carbon black, and a binder and, as a top layer, a magnetic layer consisting essentially of ferromagnetic metal powder and a binder, in which said magnetic layer has an average center-line surface roughness (Ra) of not greater than 7 nm, and said magnetic layer has an average center-line surface roughness (Ra) of 10 to 30 nm after being immersed in a hydrochloric acid aqueous solution for 24 hours.Type: GrantFiled: September 10, 1998Date of Patent: August 15, 2000Assignee: Kao CorporationInventors: Hiroki Kubo, Hideyuki Kobayashi, Kazutaka Yamashita
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Patent number: 6063489Abstract: A magnetic recording medium having a lower magnetic layer 3 and an upper magnetic layer 4 is disclosed, wherein the lower magnetic layer 3 contains tabular magnetic particles and acicular nonmagnetic inorganic particles and has a thickness of 0.5 to 2.5 .mu.m, the tabular magnetic particles being oriented with their plane having the longest diameter tilted at an angle of 70 to 90.degree. in average with the plane of the magnetic recording medium, the upper magnetic layer 4 contains acicular magnetic particles and has a thickness of not greater than 0.3 .mu.m, and a mixed magnetic region 6 which comprises tabular magnetic particles and acicular magnetic particles, mixed together, and formed between the upper and lower magnetic layers, a thickness m of the mixed magnetic region 6 being 1 to 20% of the total thickness T of all the magnetic layers.Type: GrantFiled: August 6, 1998Date of Patent: May 16, 2000Assignee: Kao CorporationInventors: Hideyuki Kobayashi, Hidehiko Nakayama, Kazutaka Yamashita, Akira Ishikawa
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Patent number: 5814394Abstract: A magnetic recording medium comprising a support having thereon a plurality of magnetic layers comprising a first magnetic layer provided as an uppermost layer and a second magnetic layer provided adjacent to said first magnetic layer, wherein the first and second magnetic layers each comprises a magnetic powder and a binder containing a vinyl chloride resin and/or cellulose resin, the binder contents in the first magnetic layer and the second magnetic layer satisfy the relationship defined by the following formula (1), and the contents of the vinyl chloride resin and the cellulose resin in the first magnetic layer and the second magnetic layer satisfy the relationship defined by the following formula (2):0.6 .ltoreq.(A-B)/B.ltoreq.6 (1)0.4 .ltoreq.(C-D)/D.ltoreq.Type: GrantFiled: February 7, 1996Date of Patent: September 29, 1998Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 5795642Abstract: Magnetic recording media comprising a nonmagnetic substrate, a surface layer and a back layer, the surface layer having an intermediate layer provided on the surface side of the nonmagnetic substrate and a magnetic layer as a top layer, the back layer having a backcoating layer provided on the back side of the nonmagnetic substrate, the magnetic layer containing a ferromagnetic metal powder and a binder, wherein the surface layer has a residual solvent content of 5 to 1000 ppm, the ferromagnetic metal powder is a ferromagnetic metal powder mainly comprising iron and containing 0.8 to 20 parts by weight of at least one element selected from Group IIIa elements, inclusive of lanthanides, of the Periodic Table per 100 parts by weight of Fe atoms, the magnetic layer has a thickness of 0.05 to 0.6 .mu.Type: GrantFiled: November 1, 1996Date of Patent: August 18, 1998Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 5792570Abstract: A magnetic recording medium comprising a substrate and a magnetic layer provided thereon, the magnetic layer containing:a binder,(a) an acicular ferromagnetic metal powder having an average major axis length of 0.05 to 0.14 .mu.m and a coercive force of 1700 to 2300 Oe or (c) a tabular hexagonal ferrite powder having a tabular diameter of 0.01 to 0.07 .mu.m and a coercive force of 1400 to 2200 Oe, and(b) a spherical or amorphous spinel ferrite powder having an average particle size of 0.005 to 0.09 .mu.m and a coercive force of more than 0 and less than 150 Oe, wherein the mixing ratio of the spinel ferrite powder (b) to the ferromagnetic metal powder (a) or the hexagonal ferrite powder (c), i.e., (b)/(a) or (b)/(c), is 0.03 to 0.3 by weight.Type: GrantFiled: November 5, 1996Date of Patent: August 11, 1998Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 5789063Abstract: A magnetic recording medium comprising a support and a magnetic layer comprising a ferromagnetic metal powder and a binder formed on said support, wherein the magnetic layer has a surface roughness of 10 nm or smaller, a coercive force of 1,580 Oe or greater and a decreasing ratio .DELTA.Bs of a saturation flux density (a change rate of saturation flux density Bs' of the magnetic layer realized after the magnetic recording medium has been allowed to stand in an environment, the temperature of which is 60.degree. C. and the relative humidity of which is 90% for 30 days, as compared with saturation flux density Bs of the magnetic layer before the magnetic recording medium is allowed to stand, the change rate being a value expressed by an equation .DELTA.Bs=(1-Bs'/Bs).times.100) of 10% or lower.Type: GrantFiled: August 9, 1996Date of Patent: August 4, 1998Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 5718978Abstract: The present invention provides a magnetic recording medium which allows high density recording and exhibits excellent output characteristics and durability. A novel magnetic recording medium comprising a support and a magnetic layer provided on said support is provided, characterized in that said magnetic layer is formed by a magnetic coating composition comprising:(a) a polyurethane resin obtained by protecting isocyanate groups in an isocyanate terminated polyurethane prepolymer by an oxime compound; and(b) a compound containing one or more primary amino groups per molecule.Type: GrantFiled: January 24, 1996Date of Patent: February 17, 1998Assignee: Kao CorporationInventors: Kazutaka Yamashita, Hidehiko Nakayama, Akira Ishikawa
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Patent number: 5705268Abstract: A magnetic recording medium comprising a nonmagnetic support having formed thereon a plurality of magnetic layers including a top magnetic layer and an intermediate magnetic layer adjacent to the top magnetic layer, wherein the intermediate magnetic layer contains soft magnetic powder, the soft magnetic powder having, in its projective image, an average longer diameter <L> and a standard deviation of the longer diameter .DELTA.L satisfying the relationship represented by formula (1), and an average shorter diameter <W> and a standard deviation of the shorter diameter .DELTA.W satisfying the relationship represented by formula (2):0.05.ltoreq..DELTA.L/<L>.ltoreq.0.8 (1)0.05.ltoreq..DELTA.W/<W>.ltoreq.0.Type: GrantFiled: December 27, 1995Date of Patent: January 6, 1998Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 5629075Abstract: Disclosed is a magnetic recording medium comprising a magnetic support 1 containing a magnetic powder, and at least a nonmagnetic layer 2 provided on the magnetic support 1 and a magnetic layer 3 provided on the nonmagnetic layer 2. The magnetic powder comprises a ferromagnetic powder, preferably a powder of soft magnetic materials and/or a powder of iron oxide with low remanent induction. The medium is suitable for high-density recording, especially exhibiting an excellent output characteristic.Type: GrantFiled: April 26, 1995Date of Patent: May 13, 1997Assignee: Kao CorporationInventors: Akira Ishikawa, Hidehiko Nakayama, Kazutaka Yamashita
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Patent number: 4808895Abstract: This invention provides an acceleration control apparatus suitable for use as various kinds of feed control. A comparator circuit compares a command value supplied from an acceleration commanding unit and an actual value of acceleration detected by a signal generator connected to a motor to be controlled. A voltage command computing circuit provided at a rear stage of the comparator circuit effect predetermined processing of an acceleration deviation signal on the basis of the result of this comparison to output the resultant command voltage to a driving control circuit. This command voltage is output to the motor and thus acceleration of the motor is controlled.Type: GrantFiled: November 30, 1987Date of Patent: February 28, 1989Assignee: Toshiba Machine Co., Ltd.Inventors: Jun Fujita, Yoshinori Nakanishi, Etsuzi Oda, Kazutaka Yamashita
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Patent number: 4795955Abstract: In a position control apparatus for a table of a machine tool, for example, wherein the position of the table is detected by a position detector and a difference between a detected position and an instructed position is used to control the speed of a driving motor of the table, the position detector is constructed as an absolute type. Further, there is provided an error correcting device producing a correction value corresponding to an instructed position or a detected position. During starting, the correction value is added to the absolute value and the sum is used to update an instructed position register.Type: GrantFiled: October 17, 1986Date of Patent: January 3, 1989Assignee: Toshiba Kikai Kabushiki KaishaInventor: Kazutaka Yamashita
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Patent number: 4101518Abstract: A thermosetting resin composition useful in a powder coating composition comprising a polyepoxy compound and a polycarboxylic acid obtained by reacting (1) one mole of a polycarboxylic acid obtained by reacting (i) one mole of a polyoxyalkylene ether of a dihydric phenol, with (ii) 1 to 4 moles of trimellitic acid or anhydride thereof, (2) from 0.1 to 0.5 moles of a diepoxy compound.Type: GrantFiled: March 28, 1977Date of Patent: July 18, 1978Assignee: Kao Soap Co., Ltd.Inventors: Shigeru Takamori, Kazutaka Yamashita, Yoshinao Kono
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Patent number: 4092295Abstract: A thermosetting resin composition useful in a powder coating composition comprising a polyepoxy compound and a polycarboxylic acid obtained by reacting 1 to 4 moles of trimellitic acid, or anhydride thereof, with a polyoxyalkylene ether of a dihydric phenol.Type: GrantFiled: March 28, 1977Date of Patent: May 30, 1978Assignee: Kao Soap Co., Ltd.Inventors: Shigeru Takamori, Kazutaka Yamashita, Yoshinao Kono
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Patent number: 4088707Abstract: A thermosetting resin composition useful in a powder coating composition comprising a polyepoxy compound and a polycarboxylic acid obtained by reacting (1) one mole of a diol compound prepared by reacting (i) one mole of an organic diisocyanate, with (ii) from 1.5 to 4.0 moles of a polyoxyalkylene ether of a dihydric phenol, with (2) 1 to 4 moles of trimellitic acid or anhydride thereof.Type: GrantFiled: March 28, 1977Date of Patent: May 9, 1978Assignee: Kao Soap Co., Ltd.Inventors: Shigeru Takamori, Kazutaka Yamashita, Yoshinao Kono
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Patent number: 4006272Abstract: A process for preparing resin-impregnated glass fiber mats in which the binder resin has a high rate of dissolution in vinyl monomers. The binder resin is a styrene resin or copolymer composed mainly of styrene, which has a melting point of 100.degree. to 150.degree. C. and a molecular weight of 2500 to 7000, or a mixture of said styrene resin or copolymer with an unsaturated polyester resin having a melting point of 80.degree. to 130.degree. C.Type: GrantFiled: February 14, 1975Date of Patent: February 1, 1977Assignee: Kao Soap Co., Ltd.Inventors: Kahei Sakaguchi, Masaaki Minakata, Kazutaka Yamashita, Fumiko Sugimoto