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Hitachi Metals, Ltd. Patents
Assignee:
Hitachi Metals, Ltd.
Address:
Tokyo, JP
No. of patents:
746
Patents:


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Patent Number Title Of Patent Date Issued
RE40524 Magnet powder-resin compound particles, method for producing such compound particles and resin-b September 30, 2008
The magnet powder-resin compound particles substantially composed of rare earth magnet powder and a binder resin are in such a round shape that a ratio of the longitudinal size a to the transverse size b (a/b) is more than 1.00 and 3 or less, and that an average particle size defined by
RE40348 Arc segment magnet, ring magnet and method for producing such magnets June 3, 2008
A thin arc segment magnet made of .[.a.]. .Iadd.an R-T-B based, .Iaddend.rare earth sintered magnet substantially comprising 28-33 weight % of R and 0.8-1.5 weight % of B, the balance being substantially .[.Fe.]. .Iadd.T.Iaddend., wherein R is at least one rare earth element includin
RE38042 Anisotropic magnetic powder and magnet thereof and method of producing same March 25, 2003
A the magnetically anisotropic magnetic powder having an average particle size of 1-1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y,
RE38021 Anisotropic magnetic powder and magnet thereof and method of producing same March 11, 2003
A the magnetically anisotropic magnetic powder having an average particle size of 1--1000 .mu.m and made from a magnetically anisotropic R-TM-B-Ga or R-TM-B-Ga-M alloy having an average crystal grain size of 0.01-0.5 .mu.m, wherein R represents one or more rare earth elements including Y
RE37834 Magnetic roll and method of producing same September 10, 2002
.[.The magnet roll according to the present invention comprising a cylindrical resin-bonded magnet, a first shaft formed by injection molding integrally with the cylindrical resin-bonded magnet at one end thereof, and a second shaft press-fitted into a bore of the cylindrical resin-b
RE33770 Heat-fixing apparatus December 17, 1991
A heat-fixing apparatus comprising a heating roll to be brought into contact with a toner image borne on a sheet member, a pressure roll in pressed contact with the heating roll to provide a nip portion therebetween, each of the heating roll and the pressure roll being constituted by
RE33022 Ferromagnetic amorphous alloy August 15, 1989
A ferromagnetic amorphous alloy having a composition represented by (Co.sub.x Ni.sub.y Fe.sub.z).sub.a M.sub.b G.sub.c, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x,y,z and a, b, c are selected to meet the conditions of x=1-y-z, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.7,
RE32005 Magnetic alloy having a low melting point October 15, 1985
A magnetic alloy having a relatively low melting point, particularly for dental use.The low melting point magnet alloy contains one or more elements of Co and Ni, a Co content of which being in the range of 79 wt. % or less, a Ni content being in the range of 80 wt. % or less, the remain
D376602 Exhaust manifold for an internal combustion engine December 17, 1996
D372250 Exhaust manifold for an internal combustion engine July 30, 1996
7474503 Thin film magnetic head wafer with identification information January 6, 2009
A thin-film magnetic head wafer includes a first principal surface and a second principal surface which are substantially parallel to each other. An electrical/magnetic transducer is provided on the first principal surface. Identification information is recorded on the first principal
7473325 Current transformer core, current transformer and power meter January 6, 2009
A current transformer core made of an alloy having a composition represented by the general formula: Fe.sub.100-x-a-y-cM.sub.xCu.sub.aM'.sub.yX'.sub.c (by atomic %), wherein M is Co and/or Ni, M' is at least one element selected from the group consisting of V, Ti, Zr, Nb, Mo, Hf, Ta
7471962 High-frequency switch circuit, high-frequency switch module and wireless communications device c December 30, 2008
A high-frequency switch circuit common to a plurality of frequency bands includes a first high-frequency switch adapted to pass transmission signals and block received signals; and a demultiplexer. The high-frequency switch circuit passes one of the received signals of first and seco
7463208 Antenna, and radio-controlled timepiece, keyless entry system and RFID system December 9, 2008
An antenna comprising a magnetic main-path member comprising a coil wound around a magnetic core, and a magnetic sub-path member magnetically connected to the magnetic core for constituting a substantially closed magnetic path with the magnetic main-path member, the antenna meeting the
7456758 Magnetic encoder apparatus November 25, 2008
To provide a magnetic encoder having high resolution and a high output, and a magnetoresistive sensor for an encoder. A fine sensor having a reduced demagnetization field is produced by: forming a free layer consists of a laminated soft magnetic film in which two soft magnetic layers
7449100 Method for forming electroplating film on surfaces of articles November 11, 2008
An object of the present invention is to provide a method for forming a uniform and dense electroplating film with high adhesion strength on the surface of an article, yet irrespective of the surface material and the surface properties of the article. A means for a solution of the proble
7445678 Maraging steel and method of producing the same November 4, 2008
Disclosed is a method of producing maraging steel, which includes producing a consumable electrode for vacuum remelting; and subjecting the consumable electrode to the vacuum remelting. The consumable electrode contains not less 5 ppm Mg. Disclosed is also a maraging steel containing
7431792 Method and apparatus for placing conductive balls October 7, 2008
Improved placing method and apparatus are provided for placing conductive balls in a predetermined pattern onto one surface of a base unit. An arrangement member is provided to have one surface, another surface opposite to the one surface of the arrangement member and positioning ope
7425239 Fe-based amorphous alloy ribbon September 16, 2008
An Fe-based amorphous alloy ribbon having a composition comprising Fe.sub.aSi.sub.bB.sub.cC.sub.d and inevitable impurities, wherein a is 80 to 83 atomic %, b is 0.1 to 5 atomic %, c is 14 to 18 atomic %, and d is 0.01 to 3 atomic %, the concentration distribution of C measured radially
7421161 Optical power monitor and its manufacturing method September 2, 2008
An optical power monitor comprising a pig-tail fiber and a GRIN lens opposed to each other with a spacing and each having an end face (angled face) angled with respect to the axis, being low on reflection loss and able to be easily assembled. The pig-tail fiber and the GRIN lens are
7412137 Optical power monitor August 12, 2008
An optical power monitor capable of being reduced in size even when designed as a multi-channel monitor, and having a reduced light transmission loss is disclosed. The optical power monitor has two optical fibers provided on the light transmission upstream and downstream sides and ha
7402226 Minute high-performance rare earth magnet for micromini product and process for producing the sa July 22, 2008
A method of manufacturing a rare earth permanent magnet comprises the steps of: forming a rare earth magnet by applying mechanical processing to a magnet block material, thereby damaging the surface of the magnet and causing a magnetic characteristic (BH)max of the magnet to deterior
7400137 Magnetic encoder having a stable output property with unsaturated magnetic sensor July 15, 2008
The present invention provides a magnetic sensor suitable for high resolution and having high reliability by achieving stable output even at the occurrence of variations in a gap between a magnetic medium and the magnetic sensor, and a magnetic encoder using the magnetic sensor. The
7395709 Fall detection device July 8, 2008
A fall detection device is provided, which accomplishes a fall judgment on acceleration by a simple calculation and improves uniformity of effective threshold value for the acceleration judgment as to a direction of an applied acceleration vector. The fall detection device produces a fal
7390425 Ferrite sintered body and method of manufacturing same June 24, 2008
The ferrite sintered body of hexagonal Z-type ferrite contains 17 mol % to 21 mol % of BaO, 6 mol % to 13 mol % of CoO, the remainder being Fe.sub.2O.sub.3 as its main components and also contains 0.05% to 1.0% by mass of Li, based on the main components, in terms of Li.sub.2CO.sub.3
7382211 Non-reciprocal circuit device June 3, 2008
A non-reciprocal circuit device comprising a first inductance element disposed between a first input/output port and a second input/output port, a second inductance element disposed between the second input/output port and a ground, a first capacitance element constituting a first pa
7381363 Plasma processing apparatus for powder and plasma processing method for powder June 3, 2008
A plasma processing apparatus for powder, and a plasma processing method of powder, in which a powder supply nozzle is provided to supply a powder material into plasma flame generated inside a high-frequency coil, the powder supply nozzle arranged substantially radially centrally of the
7381282 Co alloy target and its production method, soft magnetic film for perpendicular magnetic recordi June 3, 2008
A Co alloy target comprising 1 to 10 atomic % of Zr and 1 to 10 atomic % of Nb and/or Ta, the balance being unavoidable impurities and Co, is produced by rapidly solidifying a melt of the Co alloy to produce an alloy powder, classifying the alloy powder to maximum particle size of 50
7379751 Multi-band transceiver and radio communication device using the transceiver May 27, 2008
A multi-band transceiver has a function of sharing transmitted and received signals of multiple frequency bands by the same antenna. The multi-band transceiver mounts multiple filters that correspond to the multiple frequency bands and multiple amplifiers for amplifying the transmitt
7378839 Magnetic encoder May 27, 2008
A magnetic encoder having a magnetic sensor composed of SVGMR elements, in which a signal output with a half of a cycle of magnetic regions on a magnetic medium. The magnetic encoder comprises the magnetic medium, on which first magnetic regions and second magnetic regions are oppositely
7372132 Resin encapsulated semiconductor device and the production method May 13, 2008
A semiconductor device having both high strength and high thermal radiation that is capable of being applied to mounting on automobiles experiencing many thermal cycles, and a manufacturing method thereof are provided. A circuit board 1a for a resin encapsulated semiconductor module
7365616 Non-reciprocal element with three central conductors and communication apparatus using the same April 29, 2008
A non-reciprocal element with three central conductors and a communication apparatus are disclosed, in which the insertion loss is small and the bandwidth is wide. Three central conductors are arranged in proximity to a ferrite thin plate in such a manner as to cross each other in a
7354699 Method for producing alignment mark April 8, 2008
A method for producing an alignment mark is performed such that the alignment mark can be removed from the surface of a substrate without leaving any trace thereof after the alignment mark has been used for alignment. After a first photoresist layer has been formed on a substrate, th
7347631 Optical power monitor March 25, 2008
An optical power monitor having a reduced number of component parts, easy to assemble, capable of facilitating positioning for achieving improved optical coupling, and having a reduced size and a reduced manufacturing cost. A pigtail fiber in which the center axis of an optical fiber is
7339369 Magnetic encoder March 4, 2008
A magnetic encoder having a magnetic sensor composed of SVGMR elements, in which a signal output with a cycle equal to or less than a third of a cycle of magnetic patterns on a magnetic medium. The magnetic encoder comprises the magnetic medium, on which first magnetic regions and second
7336865 Optical switch February 26, 2008
An optical switch for switching the connection of one or more movable optical fibers to one or more stationary optical fibers, comprising a movable soft magnetic block connected to an end portion of each movable optical fiber, a stationary soft magnetic block connected to each statio
7331230 Semiconductor-type three-axis acceleration sensor February 19, 2008
There is provided a semiconductor-type three-axis acceleration sensor having a high shock resistance, a small difference between outputs of piezo resistors of X-axis, Y-axis and Z-axis, a small size, high sensitivity and a high output. A flexible arm is composed of flexible widening
7295814 Antenna switch circuit and antenna switch module November 13, 2007
An antenna switch module connected to a common antenna for switching the connection of the antenna to a transmission circuit or a receiving circuit in plural transmitting/receiving systems having different passbands, comprising a diplexer circuit comprising a low-pass filter and a hi
7291956 Laminate coil and brushless motor using same November 6, 2007
A laminate coil for an integral n-phase motor (n is a natural number of 2 or more) having pluralities of coil poles formed by patterned conductor coils formed in a laminate constituted by pluralities of insulating layers, the laminate coil comprising input and output terminals formed on
7285507 Ceramic composition being fired at low temperature and having high strength and method for prepa October 23, 2007
A high-strength, low-temperature-sintered ceramic composition having a structure comprising a SrAl.sub.2Si.sub.2O.sub.8 Crystal and an Al.sub.2O.sub.3 crystal, the SrAl.sub.2Si.sub.2O.sub.8 crystal being composed of hexagonal SrAl.sub.2Si.sub.2O.sub.8 alone or hexagonal SrAl.sub.2Si.
7285329 Fine composite metal particles and their production method, micro-bodies, and magnetic beads October 23, 2007
Fine composite metal particle comprising a metal core and a coating layer of carbon, and being obtained by reducing metal oxide powder with carbon powder.
7282265 Composite material having high thermal conductivity and low thermal expansion coefficient, and h October 16, 2007
A composite material having a high thermal conductivity and a small thermal expansion coefficient, which is obtained by impregnating a porous graphitized extrudate with a metal; the composite material having such anisotropy that the thermal conductivity and the thermal expansion coef
7257292 Variable dispersion compensator August 14, 2007
The dispersion compensator with an etalon and a mirror arranged in parallel or at a slight angle with respect to each other is constructed so that emitted light from a collimator is reflected by the etalon multiple times and then enters another collimator. The dispersion compensator
7255497 Unidirectional optical power monitor August 14, 2007
A small-sized uni-directional optical power monitor with an excellent directional characteristic is disclosed. The monitor comprises: a GRIN lens having a tap film for transmitting and reflecting an optical signal from an input and an output optical fiber with a predetermined ratio; and
7253702 High-frequency switch module August 7, 2007
A high-frequency switch module, including a laminate constituted of dielectric layers having electrode patterns, the high-frequency switch module also including a high-frequency switch circuit for switching a transmitting circuit and a receiving circuit of transmitting/receiving syst
7242268 Unbalanced-balanced multiband filter module July 10, 2007
An unbalanced-balanced multiband filter module comprising three high-frequency switches each comprising a switching element, and two unbalanced-balanced bandpass filters having different transmitting frequency bands, a first high-frequency switch being connected to an unbalanced port
7229507 High speed tool steel June 12, 2007
A high speed tool steel, which is high in impact value and free from variations in tool performance, comprising, by mass %, of: 0.4.ltoreq.C.gtoreq.0.9; Si.ltoreq.1.0; Mn.ltoreq.1.0; 4.ltoreq.Cr.gtoreq.6; 1.5 6 in total of either or both of W and Mo in the form of (1/2W+Mo) wherein W
7222536 Semiconductor acceleration sensor May 29, 2007
A semiconductor acceleration sensor is disclosed which has a small difference in acceleration detection sensitivity among X, Y, and Z axes and a high detection sensitivity. The acceleration sensor has a mass portion in its center, a support frame surrounding the mass portion, and a p
7221922 Switch circuit and composite high frequency elements May 22, 2007
A switch circuit for switching the connection of the receiving or transmitting circuits of two communication systems to an antenna circuit, which comprises first and second switch means having two switching elements, the first switch means comprising a first inductance element betwee
7198983 Solder ball excellent in micro-adhesion preventing properties and wetting properties and method April 3, 2007
The present invention provides a solder ball that has solved the problem of micro-adhesion and, moreover, has solved both of the problems of micro-adhesion and wetting properties, and a method for preventing the micro-adhesion of solder balls. That is, the present invention provides a
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