Patents by Inventor Hiroko Matsunaga

Hiroko Matsunaga 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).

  • Patent number: 12163809
    Abstract: A resolver body including a rotor having Nx (Nx is a natural number) salient poles, a stator facing the rotor and having Ns (Ns is an integer equal to or larger than 3) teeth arranged in a circumferential direction, and an excitation winding and two phases of output windings wound on each tooth; and an excitation circuit configured to apply voltage to the excitation winding. The excitation winding and the two phases of output windings wound on each of Nsm (Nsm is an integer equal to or larger than 2) teeth among the Ns teeth are set to be of a main system. The excitation winding and the two phases of output windings wound on each of Ns-Nsm teeth are set to be of a sub-system. The number Nsm of the teeth corresponding to the main system is larger than the number Ns-Nsm of the teeth corresponding to the sub-system.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: December 10, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroko Ikeda, Shohei Fujikura, Tatsuya Mori, Kenji Ikeda, Kenta Kubo, Toshihiro Matsunaga
  • Patent number: 12152914
    Abstract: To solve a problem that the accuracy of angle detection deteriorates owing to noise voltage generated by eccentricity or variation in shape among rotors according to the number of magnetic poles of a rotor core of a multiple-system rotation sensor, the number S of magnetic poles of a stator core is, with the number R of the magnetic poles of the rotor core and the number N (N is a natural number equal to or larger than 2) of systems for stator windings, in a relationship of S=nRN (n is a natural number), system windings of each system are wound so as to be divided for every R magnetic poles among the S magnetic poles of the stator core, and a winding arrangement of the system windings of each system is made so as to achieve R-times rotational symmetry about a rotor rotation axis.
    Type: Grant
    Filed: April 9, 2020
    Date of Patent: November 26, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shohei Fujikura, Hiroko Ikeda, Tatsuya Mori, Kenji Ikeda, Kenta Kubo, Toshihiro Matsunaga
  • Patent number: 12085418
    Abstract: To provide an abnormality detection apparatus for resolver which can determine the abnormality of at least the first system, even if the period of the excitation AC voltage of the first system and the period of the excitation AC voltage of the second system are different periods, and the magnetic interference between systems occurs. An abnormality detection apparatus for resolver applies an AC voltage of a first period to a first system excitation winding; applies an AC voltage of a second period different from the first period to a second system excitation winding; calculates DC values of first system two output signals by performing a DC extraction processing; and determines abnormality of first system based on whether or not the DC values of first system two output signals are within a normal range.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: September 10, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
  • Patent number: 12068702
    Abstract: In an electric motor control device which controls rotation of an AC electric motor having two sets of three-phase windings and provided with a resolver having two systems by calculating voltage command values on dq axes, dq conversion of currents of first three-phase windings is performed using a first angle calculated from output of the first system of the resolver, and dq conversion of currents of second three-phase windings is performed using a second angle calculated from output of the second system of the resolver. With both d-axis current command values set at the same value, respective voltage command values on dq axes are calculated and respectively converted into voltage command values for voltage application to the first three-phase windings, using the first angle, and converted into voltage command values for voltage application to the second three-phase windings, using the second angle.
    Type: Grant
    Filed: May 19, 2020
    Date of Patent: August 20, 2024
    Assignee: Mitsubishi Electric Corporation
    Inventors: Masahiko Orii, Tatsuya Mori, Hiroko Ikeda, Toshihiro Matsunaga, Kenji Ikeda, Kenta Kubo
  • Publication number: 20180073023
    Abstract: An object of the present invention is to provide a circular single-stranded nucleic acid, and a method for preparing the same and a method for using the same. A circular single-stranded nucleic acid according to one embodiment of the present invention is a circular single-stranded nucleic acid for determining a target base on a genomic DNA, and includes a first single-stranded nucleic acid which has the target base or a complementary base thereto and is a part of one of the strands of the genomic DNA, and a second single-stranded nucleic acid which has an index sequence to serve as an index of a cell, from which the genomic DNA is derived, or a complementary sequence thereto.
    Type: Application
    Filed: August 30, 2017
    Publication date: March 15, 2018
    Inventors: Hiroko MATSUNAGA, Maiko TANABE
  • Publication number: 20160333397
    Abstract: A reaction liquid after a nucleic acid amplification reaction is made suitable for various processes. A step of measuring the amount of a target product and the amount of a byproduct after performing a nucleic acid amplification reaction, and a step of determining that a process for removing the byproduct is needed when the abundance ratio of the target product to the byproduct is lower than a prescribed value, and determining the dilution ratio of a reaction liquid after the nucleic acid amplification reaction when the abundance ratio is higher than the prescribed value are included.
    Type: Application
    Filed: January 27, 2014
    Publication date: November 17, 2016
    Applicant: HITACHI, LTD.
    Inventors: Hiroko Matsunaga, Tomoharu Kajiyama, Mari Ohta, Hideki Kambara
  • Publication number: 20140065704
    Abstract: The present invention provides a simple and highly reliable cell collection system with high throughput and improved in cell collection efficiency. In the present invention, one or more pores are formed in a cell collection plate. One surface of the plate can be directly introduced in e.g., a petri dish, so as to be in contact with a solution containing cells. In this case, means for obtaining an optical image of collected cells from its rear surface is provided to improve reliability and convenience during a cell collection process. Alternatively, the vicinities of the pores in the cell collection plate are only hydrophilized and the other region is made water repellent to improve the efficiency of cell collection.
    Type: Application
    Filed: April 10, 2012
    Publication date: March 6, 2014
    Inventors: Masataka Shirai, Hiroyuki Tsunoda, Hiroko Matsunaga, Kenko Uchida
  • Publication number: 20080318244
    Abstract: It is intended to provide a technique for amplifying, individually and in parallel, nucleic acids contained in a mixture of plural kinds of nucleic acid samples. The present invention provides a nucleic acid analysis method comprising amplification means, whereby amplification reaction is performed in a reaction solution comprising a homogeneous solvent and comprising at least plural template nucleic acids and solid phase carriers comprising one or more kinds of amplification probes immobilized on the surface, to prevent amplified products attributed to two or more template nucleic acids from being replicated in one solid phase carrier. According to the present invention, plural kinds of analyte nucleic acid samples in a mixed state can be amplified individually and in parallel. This method achieves one solid phase carrier-one nucleic acid. Therefore, a higher density of solid phase carriers with obtained amplified products is easily achieved, leading to improved throughput of amplified product analysis.
    Type: Application
    Filed: June 19, 2008
    Publication date: December 25, 2008
    Inventors: Hiroko Matsunaga, Hideki Kambara, Tomoharu Kajiyama
  • Patent number: 7214781
    Abstract: A method for the diagnosis and identification of new or residual lung cancer is disclosed which uses newly identified markers for lung cancer including syndecan 1, collagen 1 alpha 2, and two novel proteins, 7013 and 7018. The method involves identification of the lung cancer markers is blood from a patient. It is envisioned that at least one marker may be used or any mixture of the four. The method may also include the identification of cytokeratin-19.
    Type: Grant
    Filed: June 21, 2001
    Date of Patent: May 8, 2007
    Assignees: Hitachi Chemical Research Center, Inc., Hitachi Chemical Co., Ltd.
    Inventors: Masato Mitsuhashi, Hiroko Matsunaga, Hideki Kambara, Masafumi Kawamura
  • Publication number: 20060275783
    Abstract: A method for the diagnosis and identification of new or residual lung cancer is disclosed which uses newly identified markers for lung cancer including syndecan 1, collagen 1 alpha 2, and two novel proteins, 7013 and 7018. The method involves identification of the lung cancer markers is blood from a patient. It is envisioned that at least one marker may be used or any mixture of the four. The method may also include the identification of cytokeratin-19.
    Type: Application
    Filed: October 19, 2005
    Publication date: December 7, 2006
    Inventors: Masato Mitsuhashi, Hiroko Matsunaga, Hideki Kambara, Masafumi Kawamura
  • Publication number: 20060223087
    Abstract: A simple and highly accurate method for detecting the presence or absence of gene mutation and methylated cytosine in CpG dinucleotide that are contained in a target sequence derived from an analysis sample is provided. Features of the method for nucleic acid analysis include cleaving one or more noncomplementary sites in a double-stranded nucleic acid sample by a single strand-specific endonuclease, hybridizing at least one of the nucleic acid fragments obtained to a probe containing a nucleotide sequence that is partially or totally identical to either one strand of the double-stranded nucleic acid sample, allowing an extension reaction to proceed from the nucleic acid fragment hybridized to the probe, and optically detecting pyrophosphate generated by the extension reaction, thereby judging the presence or absence of at least a noncomplementary site in the double-stranded nucleic acid sample.
    Type: Application
    Filed: January 31, 2006
    Publication date: October 5, 2006
    Inventors: Kiyomi Taniguchi, Keiichi Nagai, Hiroko Matsunaga
  • Publication number: 20050287549
    Abstract: This invention provides a method of genetic testing that enables testing of a plurality of variation sites (SNPs) in a cost-effective and simple manner, allowing realization of genetic diagnosis in clinical settings. The SNP type of the nucleic acid sample is evaluated by: allowing a nucleic acid sample having an anchor sequence at its 5? end to hybridize to a support having, immobilized on its surface, a probe containing a sequence that is complementary to the target sequence (the SNP region); extending a complementary strand from the probe utilizing the nucleic acid sample as a template; dissociating and removing the nucleic acid sample from the extended probe; extending a complementary strand using the extended probe as a template and a primer having a sequence identical to the anchor sequence; and detecting pyrophosphoric acid generated via the primer extension, based on bioluminescence.
    Type: Application
    Filed: January 25, 2005
    Publication date: December 29, 2005
    Inventors: Keiichi Nagai, Kazunori Okano, Hideyuki Noda, Hiroko Matsunaga, Kiyomi Taniguchi, Yoshiaki Yazawa, Tomoharu Kajiyama
  • Publication number: 20030215828
    Abstract: A method for the diagnosis and identification of new or residual lung cancer is disclosed which uses newly identified markers for lung cancer including syndecan 1, collagen 1 alpha 2, and two novel proteins, 7013 and 7018. The method involves identification of the lung cancer markers is blood from a patient. It is envisioned that at least one marker may be used or any mixture of the four. The method may also include the identification of cytokeratin-19.
    Type: Application
    Filed: April 4, 2003
    Publication date: November 20, 2003
    Inventors: Masato Mitsuhashi, Hiroko Matsunaga, Hideki Kambara, Masafumi Kawamura
  • Patent number: 6514702
    Abstract: There are beforehand prepared a monomer having a reaction residue and a polynucleotide probe set comprising plural kinds of polynucleotide probes having a residue bonded to the reaction residue. The monomer is mixed with each kind of polynucleotide probes comprising any plural probes selected from the polynucleotide probe set. Each kind of the resultant mixtures is added to each of different small holes to make the mixture into gel matrix. Thus, a polynucleotide probe chip is produced. Sample DNA is forcibly migrated in the gels by electrophoresis. Laser light is projected onto the side face of the chip. The fluorescence emitted from the whole surface of the chip is collectively detected with a high-sensitive two-dimensional detector. Thus, the polynucleotide probe chip, holding various kinds of DNA probes, for detecting DNA can be provided. This chip has high hybridization-efficiency and makes high-sensitivity and high-speed DNA detection possible.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: February 4, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kazunori Okano, Hideki Kambara, Chihiro Uematsu, Hiroko Matsunaga, Takashi Irie, Tomoharu Kajiyama, Kenji Yasuda
  • Patent number: 6183970
    Abstract: There are beforehand prepared a monomer having a reaction residue and a polynucleotide probe set comprising plural kinds of polynucleotide probes having a residue bonded to the reaction residue. The monomer is mixed with each kind of polynucleotide probes comprising any plural probes selected from the polynucleotide probe set. Each kind of the resultant mixtures is added to each of different small holes to make the mixture into gel matrix. Thus, a polynucleotide probe chip is produced. Sample DNA is forcibly migrated in the gels by electrophoresis. Laser light is projected onto the side face of the chip. The fluorescence emitted from the whole surface of the chip is collectively detected with a high-sensitive two-dimensional detector. Thus, the polynucleotide probe chip, holding various kinds of DNA probes, for detecting DNA can be provided. This chip has high hybridization-efficiency and makes high-sensitivity and high-speed DNA detection possible.
    Type: Grant
    Filed: August 26, 1999
    Date of Patent: February 6, 2001
    Assignee: Hitachi, Ltd.
    Inventors: Kazunori Okano, Hideki Kambara, Chihiro Uematsu, Hiroko Matsunaga, Takashi Irie, Tomoharu Kajiyama, Kenji Yasuda
  • Patent number: 5968743
    Abstract: The present invention provides a DNA sequencing method comprising: (1) a step of fragmentation of a sample DNA and amplifying each fragment to obtain a first DNA fragment; (2) a step of obtaining from the first DNA fragment a second DNA fragment substantially complementary to the sample DNA at least at the 3' terminus thereof; and (3) a step of performing an extension reaction of complementary strand, using the sample DNA as a template to produce a third DNA fragment containing a base sequence complementary to the second DNA fragment and having a size longer than that of the second DNA fragment, and using the third DNA fragment as a template for sequencing of the sample DNA. DNA sequencing can be proceeded efficiently with extremely low redundancy.
    Type: Grant
    Filed: October 9, 1997
    Date of Patent: October 19, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Hiroko Matsunaga, Kazunori Okano, Hideki Kambara