Patents by Inventor Masahiro Koya

Masahiro Koya 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).

  • Publication number: 20200374245
    Abstract: A non-transitory computer readable recording medium records a conversation control program that causes a computer to execute processing including: receiving an instruction to change a specific input message among messages displayed in times series to another input message; and displaying the other input message and a response message to the other input message in time series.
    Type: Application
    Filed: August 10, 2020
    Publication date: November 26, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Taki KONO, Yu Tomita, Masahiro KOYA, Hiroyuki KASHIWAGI
  • Publication number: 20200311073
    Abstract: A non-transitory computer-readable recording medium records an output control program for causing a computer to execute processing of: in a case where input of a question is accepted, extracting an accuracy of each of one or a plurality of answers to the question, the accuracy being stored in a storage unit; and selecting an answer to be output from the one or plurality of answers so that a total value of the accuracy of the one or plurality of answers to the question is equal to or larger than a first threshold.
    Type: Application
    Filed: June 15, 2020
    Publication date: October 1, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Yu Tomita, Masahiro KOYA, Taki KONO, Hiroyuki KASHIWAGI
  • Publication number: 20200251579
    Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.
    Type: Application
    Filed: April 21, 2020
    Publication date: August 6, 2020
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Isao OBU, Yasunari UMEMOTO, Masahiro SHIBATA, Shigeki KOYA, Masao KONDO, Takayuki TSUTSUI
  • Patent number: 10665704
    Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.
    Type: Grant
    Filed: September 7, 2018
    Date of Patent: May 26, 2020
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Isao Obu, Yasunari Umemoto, Masahiro Shibata, Shigeki Koya, Masao Kondo, Takayuki Tsutsui
  • Publication number: 20200089200
    Abstract: A production management support apparatus includes a memory, and a processor configured to, in response to receiving information indicating a design change of a product, display an image including both first information and second information, the first information regarding a first configuration of a first plurality of elements in the product before the design change, the second information regarding a second configuration of a second plurality of elements in the product after the design change, perform display of inventory information of, among the first plurality of elements, a first element whose inventory is predicted to be generated due to the design change, receive time information indicating a time when the design change is executed, and based on the received time information, modify the inventory information of the first element into a modified inventory information of the first element.
    Type: Application
    Filed: August 29, 2019
    Publication date: March 19, 2020
    Applicant: FUJITSU LIMITED
    Inventors: Yosuke OOTAKE, Masahiro KOYA, KOJI OGIWARA, Takehiro FUKUDA, Yoichi Fukunaga
  • Publication number: 20190172933
    Abstract: A bipolar transistor including a first collector layer, a second collector layer, a base layer, and an emitter layer is disposed on a substrate. Etching characteristics of the second collector layer are different from etching characteristics of the first collector layer and the base layer. In plan view, an edge of an interface between the first collector layer and the second collector layer is disposed inside an edge of a lower surface of the base layer, and an edge of an upper surface of the second collector layer coincides with the edge of the lower surface of the base layer or is disposed inside the edge of the lower surface of the base layer.
    Type: Application
    Filed: November 30, 2018
    Publication date: June 6, 2019
    Applicant: Murata Manufacturing Co., Ltd.
    Inventors: Isao OBU, Yasunari UMEMOTO, Masahiro SHIBATA, Shigeki KOYA, Masao KONDO, Takayuki TSUTSUI
  • Patent number: 5903843
    Abstract: A radio communication system and a traffic channel assignment method for realizing the assignment of traffic channels capable of improving the efficiency of use of frequency in the case where the traffic density is high and improving a radio link quality in the case where the traffic density is low. A base station judges the traffic density from a carrier to interference power ratio (CIR) on each channel capable of being selected as a traffic channel. In the case where the traffic density is low, a traffic channel assignment mode selecting an available channel having a greater CIR is assigned as a traffic channel to a mobile station. In the case where the traffic density is high, a traffic channel assignment mode selecting an available channel having a smaller CIR is assigned as a traffic channel to the mobile station. Thereby, it is possible to structure a radio communication system which can cope with the condition of the traffic density of the neighborhood.
    Type: Grant
    Filed: July 11, 1995
    Date of Patent: May 11, 1999
    Assignee: Hitachi, Ltd.
    Inventors: Hideya Suzuki, Arata Nakagoshi, Masahiro Koya, Noriyuki Sugiura
  • Patent number: 5566191
    Abstract: There is provided a maximum likelihood decoding method, and an apparatus, capable of correcting burst errors caused by abrupt lowering of the signal amplitude. The soft decision maximum likelihood decoding method is a maximum likelihood decoding method for conducting maximum likelihood decoding on a received train resulting from addition of an error train to a transmission code train, which has been obtained by coding an information train by using convolutional codes on a transmission side. The soft decision maximum likelihood decoding method includes the step of making corrections by multiplying the soft decision likelihood metric having a multi-valued level, which has been obtained by soft decision likelihood metric from the received train, by weighting coefficients depending upon an instantaneous amplitude of the received signal, and the step of conducting maximum likelihood decoding by using corrected soft decision likelihood metric values.
    Type: Grant
    Filed: May 7, 1993
    Date of Patent: October 15, 1996
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Makoto Ohnishi, Yasuko Shinata, Yoshiaki Asakawa, Masahiro Koya
  • Patent number: 5042027
    Abstract: A communication network system includes a communication line, a plurality of communication stations each having a node coupled to the communication line and a network controller coupled to the stations for controlling routing for communication messages between nodes. In one embodiment, the messages are sent from plural terminals connected with each node along with communication performance prerequisites. The communication performance prerequisites for a communication message are discriminated in the node which receives the message. Traffic in various routes between the nodes is continually measured in the communication stations and the measuring results are stored in a database storage unit.
    Type: Grant
    Filed: September 8, 1989
    Date of Patent: August 20, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Takase, Masahiro Takatori, Yoshiaki Takemura, Naoya Kobayashi, Yasushi Sawada, Yukio Nakano, Yasushi Takahashi, Masahiro Koya, Yoshitaka Takasaki
  • Patent number: 4881271
    Abstract: In portable wireless communication systems wherein subscriber stations communicate with a plurality of base stations each covering a predetermined area, communication lines are provided for dedicating to the exchange of the use status and observation result of radio channels with the plurality of base stations in order that each base station can autonomically manage the determination of a base station with which a subscriber station communicates, the selection of a radio channel to be used, and the like.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: November 14, 1989
    Assignee: Hitachi, Ltd.
    Inventors: Yukiji Yamauchi, Nobuo Tsukamoto, Masahiro Koya
  • Patent number: 4752903
    Abstract: An adaptive digital filter is connected in parallel with a transmission system and includes a plurality of delay circuits, a nonrecursive digital filter having coefficient parameters of the delay circuits so as to approximate the characteristics of the transmission system, and a correction circuit for correcting the coefficient parameters of the nonrecursive digital filter. The adaptive digital filter further includes a first variable attenuator, a second variable attenuator and a comparator. The first variable attenuator receives an input signal for the adaptive digital filter, variably attenuates the input signal in response to a first control signal, and supplies an attenuated input signal to the transmission system and the nonrecursive digital filter. The second variable attenuator receives a difference between the output signals from the nonrecursive digital filter and the transmission system and variably attenuates the difference signal in response to a second control signal.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: June 21, 1988
    Assignees: Hitachi Densi Kabushiki Kaisha, Hitachi, Ltd.
    Inventors: Yoshihiro Iwata, Masahiro Koya
  • Patent number: 4531089
    Abstract: In a gain control circuit, an electric power calculating circuit is connected to a variable gain amplifier and a gain setting circuit for generating a gain control signal applied to the variable gain amplifier to control the gain thereof.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: July 23, 1985
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Kohei Ishizuka, Yasuhiro Kita, Narimichi Maeda, Masahiro Koya, Kazuhiko Takaoka, Yoshiro Kokuryo
  • Patent number: 4477913
    Abstract: An equalizer apparatus suitable for use in a MODEM for receiving a signal having passed through a number of carrier-band lines is disclosed in which the number of carrier-band lines is detected from a training signal, and electrical connection of a fixed equalizer to a variable equalizer is controlled on the basis of the number of carrier-band lines, in order to form a precise, simple automatic equalizer apparatus.
    Type: Grant
    Filed: April 15, 1982
    Date of Patent: October 16, 1984
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Masahiro Koya, Narimichi Maeda, Kohei Ishizuka, Kazuhiko Takaoka, Yoshiro Kokuryo, Yasuhiro Kita
  • Patent number: 4441192
    Abstract: A signal processing system detects the transmission characteristics of a channel thereby to compensate the output waveform of the channel into the most-optimum state. The impulse response of the channel is detected by transmitting a code having a keen autocorrelation from the transmission end and by determining the correlation between the received signal of the code transmitted and the same code of the aforementioned code at a reception end.
    Type: Grant
    Filed: August 19, 1981
    Date of Patent: April 3, 1984
    Assignee: Hitachi, Ltd.
    Inventors: Yasuhiro Kita, Nobuo Tsukamoto, Masahiro Koya, Narimichi Maeda
  • Patent number: 4370388
    Abstract: A laminated multilayer structure composed of a grafted high-density polyethylene resin layer directly attached to a layer of a resin selected from the group consisting of polyamide resins, polyester resins saponified copolymers of ethylene and vinyl acetate, or to a metal layer; characterized in that said grafted high-density polyethylene resin layer is composed of(a) 97 to 50 parts by weight, per 100 parts by weight of the resins (a) and (b) combined, of a high-density polyethylene resin having a density of 0.945 to 0.970 g/cm.sup.3 and being grafted with an aliphatic dicarboxylic acid or its functional derivative, with or without a high-density polyethylene resin having a density of 0.945 to 0.970 g/cm.sup.3,(b) 3 to 50 parts by weight, per 100 parts by weight of the resins (a) and (b) combined, of an ethylene/4-methyl-1-pentene copolymer having an ethylene content of 93 to 99.9 mole % and a melt index at 190.degree. C. of 0.1 to 10 g/10 min.
    Type: Grant
    Filed: March 11, 1980
    Date of Patent: January 25, 1983
    Assignee: Mitsui Petrochemical Industries Ltd.
    Inventors: Masaharu Mito, Masahiro Koya