Patents by Inventor Hiroaki Ozeki

Hiroaki Ozeki 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: 11437635
    Abstract: A fuel cell system includes: a fuel cell that is supplied with a reaction gas to generate electricity; a plurality of auxiliary components used for power generation of the fuel cell; and a control device that causes the fuel cell to generate electricity when a predetermined scavenging start condition is satisfied and controls the auxiliary components using electric power generated by the fuel cell to perform a scavenging process of removing water in a flow path of the reaction gas using the reaction gas, during a stop period in which electric power is not supplied to a load from the fuel cell system.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: September 6, 2022
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Mahiro Ozeki, Masashi Toida, Hiroaki Mori, Toshiyuki Sanada
  • Patent number: 11401393
    Abstract: A prepreg includes a resin composition or a semi-cured product of the resin composition, and a glass cloth, wherein the resin composition contains a modified polyphenylene ether compound terminally modified with a substituent having an unsaturated carbon-carbon double bond, and a crosslinkable curing agent having an unsaturated carbon-carbon double bond in a molecule, a content of the modified polyphenylene ether compound is 40 to 90 mass % with respect to a total mass of the modified polyphenylene ether compound and the crosslinkable curing agent, a cured product of the resin composition has a relative permittivity of 2.6 to 3.8, the glass cloth has a relative permittivity of 4.7 or less and a dielectric loss tangent of 0.0033 or less, and a cured product of the prepreg has a relative permittivity of 2.7 to 3.8 and a dielectric loss tangent of 0.002 or less.
    Type: Grant
    Filed: September 28, 2018
    Date of Patent: August 2, 2022
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuki Kitai, Mikio Sato, Yasunori Hoshino, Masashi Koda, Takayoshi Ozeki, Hiroaki Fujiwara
  • Publication number: 20190187406
    Abstract: To ensure high operability regarding a manipulation ring, without causing a decline in functionality. An interlock member configured to be operated by rotational force of a rotationally-manipulated manipulation ring, and operate an optical element by transmitting the rotational force of the manipulation ring to the optical element is included, and a changeover mechanism configured to change over an operation direction of the optical element with respect to a rotation direction of the manipulation ring is provided at least on the interlock member.
    Type: Application
    Filed: July 10, 2017
    Publication date: June 20, 2019
    Inventors: HISAYOSHI HATTORI, HIROAKI OZEKI, HUI LIU
  • Patent number: 8433013
    Abstract: A receiver includes an oscillator for generating a local oscillator signal, a frequency converter for heterodyning a received signal of one frequency band or a plurality of frequency bands into an intermediate frequency (IF) signals with using the local oscillator signal, a filter connected to an output of the frequency converter and having a cut-off frequency changeable, an analog-digital (AD) converter connected to an output of the filter to convert an analog signal of one frequency band or a plurality of frequency bands into a digital signal, a pre-stage detector connected to an output of the AD converter or connected between the filter and the AD converter to detect a signal level, and a controller for controlling the cut-off frequency of the filter based on the signal level detected by the pre-stage detector.
    Type: Grant
    Filed: April 8, 2009
    Date of Patent: April 30, 2013
    Assignee: Panasonic Corporation
    Inventors: Yusuke Nakano, Hiroaki Ozeki, Yasunobu Tsukio, Takeshi Fujii
  • Patent number: 8401857
    Abstract: Assisting apparatus that assists in a task for generating task-completed data from original data. The assisting apparatus includes: a conversion unit that converts the original data into converted data in order to keep a content of the original data secret from an operator in charge of the task; an interface unit that provides the converted data to the operator, and thereby allows the operator to perform the task by using the converted data and thus to generate a task-completed version of the converted data; and an inverse conversion unit that generates the task-completed data by performing inverse conversion of the task-completed version of the converted data.
    Type: Grant
    Filed: February 22, 2010
    Date of Patent: March 19, 2013
    Assignee: International Business Machines Corporation
    Inventors: Kohtaroh Miyamoto, Hiroaki Ozeki, Takashi Saitoh
  • Patent number: 8311155
    Abstract: Demodulator includes reception quality evaluation circuit for evaluating the quality of a received signal by comparison with a first reference value, and outputting an evaluation signal; and driving circuit receiving the evaluation signal. If reception quality evaluation circuit evaluates that the quality of the received signal is acceptable, power supply from driving circuit to DC offset control loop is stopped. This offers a high-frequency receiver that reduces power consumption.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: November 13, 2012
    Assignee: Panasonic Corporation
    Inventors: Takashi Umeda, Hiroaki Ozeki, Akira Fujishima
  • Patent number: 8244197
    Abstract: In an image rejection mixer, when a signal in the first radio frequency band is inputted to an input terminal, the first mixer and the second mixer convert the input signal in the first radio frequency band to a signal in the first intermediate frequency band by using the first local signal from a local signal oscillator, and a filter circuit attenuates an image interfering signal existing in the first intermediate frequency band by means of the first attenuation band. Also, when a signal in the second radio frequency band is inputted to the input terminal, the first mixer and the second mixer convert the input signal in the second radio frequency band to a signal in the second intermediate frequency band by using the second local signal from the local signal oscillator, and the filter circuit attenuates an image interfering signal existing in the second intermediate frequency band by means of the second attenuation band that is narrower than the first attenuation band.
    Type: Grant
    Filed: March 27, 2008
    Date of Patent: August 14, 2012
    Assignee: Panasonic Corporation
    Inventors: Takeshi Fujii, Hiroaki Ozeki, Mineyuki Iwaida
  • Patent number: 8224374
    Abstract: A first switching circuit (21) outputs a first radio signal representing a plurality of time-division multiplexed programs and a second radio signal other than the first radio signal, one at a time according to a switching signal. A voltage control oscillator (27) outputs a local signal at a frequency suitable for whichever signal outputted. Using the local signal generated, a frequency converter (24) frequency converts the first and second radio signals to first and second baseband signals, respectively. Via a second switching circuit (31), a first baseband unit (40) and a second baseband unit (50) are supplied with the first and second baseband signals, respectively, and demodulate them to first and second data signals. A switching unit (60) supplies the switching signal indicating periods during which the first radio signal represents a user-selected program, to a tuner unit (20) where the first and second radio signals are processed by time-sharing.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: July 17, 2012
    Assignee: Panasonic Corporation
    Inventors: Hisaya Kato, Hiroaki Ozeki
  • Patent number: 8208590
    Abstract: Filter circuit includes Nth-order active filters switching circuit which switches shorting or non-shorting of active filter, and power-supply control circuit which controls such that a power supply of active filter is turned off when switching circuit shorts active filter. A receiver employing filter circuit turns off the power supply of active filter not needed when no interference wave exists within a given range from a desired frequency band. The foregoing structure allows lowering the power consumption of filter circuit.
    Type: Grant
    Filed: November 8, 2007
    Date of Patent: June 26, 2012
    Assignee: Panasonic Corporation
    Inventors: Eiji Okada, Takeshi Fujii, Hiroaki Ozeki
  • Patent number: 8183915
    Abstract: An oscillator unit is configured such that a frequency adjustment unit of a synthesizer used by a controller is smaller than a frequency variation tracking capability of a demodulator connected to an output side of a frequency converter. This structure successfully combines the temperature compensation control of an oscillator unit and the receiving process of a high-frequency receiving device. Accordingly, an oscillator unit with large temperature coefficient is applicable to high-frequency receiving devices.
    Type: Grant
    Filed: June 2, 2011
    Date of Patent: May 22, 2012
    Assignee: Panasonic Corporation
    Inventors: Yasunobu Tsukio, Akihiko Namba, Hiroaki Ozeki
  • Patent number: 8165550
    Abstract: A broad oscillation frequency range and good phase noise characteristic are achievable simultaneously by an oscillation circuit and a resonance circuit connected to the oscillation circuit. The resonance circuit includes an inductor element connected to the oscillation circuit, a first variable capacitance section connected to the inductor element, and a second variable capacitance section connected in parallel to the first variable capacitance section. The first variable capacitance section includes a first variable capacitive element connected to the inductor element, and a second variable capacitive element connected in parallel to the first variable capacitive element. The first variable capacitive element changes its capacity value based on a control voltage and a first reference voltage. The second variable capacitive element changes its capacity value based on the control voltage and a second reference voltage.
    Type: Grant
    Filed: March 7, 2008
    Date of Patent: April 24, 2012
    Assignee: Panasonic Corporation
    Inventors: Takeshi Fujii, Yasuo Ooba, Mineyuki Iwaida, Hiroaki Ozeki
  • Patent number: 8145173
    Abstract: A receiver includes a first receiving section, a second receiving section, and a controller. A controller is operable to switch between a diversity receiving mode in which both of the first receiving section and the second receiving section are activated and a single receiving mode in which the first receiving section is activated while the second receiving section is deactivated. The controller allows the first mixer to heterodyne the signal output from the first RF amplifier with using the second oscillation signal and output the heterodyned signal in the first single receiving mode.
    Type: Grant
    Filed: November 21, 2007
    Date of Patent: March 27, 2012
    Assignee: Panasonic Corporation
    Inventors: Daisuke Nishimura, Hiroaki Ozeki, Yoshio Fuwa, Kazuyori Doumoto
  • Patent number: 8141146
    Abstract: Upon receipt of a service use request from a client, an authentication server device reads one or more image information pieces from an image information storage storing multiple image information pieces each containing one or more known symbols, one or more dummy symbols, or both of them, and thereafter creates challenge data using the one or more read image information pieces so that one or more two-dimensional images each containing one or more of the known symbols and one or more two-dimensional images each containing one or more of the dummy symbols can be presented to the user of the client, one image at a time. Upon receipt of response data, the authentication server device judges whether or not the received response data matches the one or more known symbols contained in the challenge data, and approves the service use of the client device if the match is confirmed.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: March 20, 2012
    Assignee: International Business Machines Corporation
    Inventor: Hiroaki Ozeki
  • Patent number: 8064558
    Abstract: A receiving apparatus includes a first receiver, a second receiver, a received signal synthesizer connected to the first and second receivers, a synchronizing signal synthesizer connected to the first and second receivers, and a synchronization detector connected to the synchronizing signal synthesizer. In this structure, synchronization determination is performed using a synchronizing signal of either the first or second receiver, and diversity reception is performed using the received signals of the first and second receivers.
    Type: Grant
    Filed: August 28, 2007
    Date of Patent: November 22, 2011
    Assignee: Panasonic Corporation
    Inventors: Yasunobu Tsukio, Hiroaki Ozeki
  • Publication number: 20110260787
    Abstract: An oscillator unit is configured such that a frequency adjustment unit of a synthesizer used by a controller is smaller than a frequency variation tracking capability of a demodulator connected to an output side of a frequency converter. This structure successfully combines the temperature compensation control of an oscillator unit and the receiving process of a high-frequency receiving device. Accordingly, an oscillator unit with large temperature coefficient is applicable to high-frequency receiving devices.
    Type: Application
    Filed: June 2, 2011
    Publication date: October 27, 2011
    Applicant: Panasonic Corporation
    Inventors: Yasunobu Tsukio, Akihiko Namba, Hiroaki Ozeki
  • Patent number: 8040178
    Abstract: An oscillator unit is configured such that a frequency adjustment unit of a synthesizer used by a controller is smaller than a frequency variation tracking capability of a demodulator connected to an output side of a frequency converter. This structure successfully combines the temperature compensation control of an oscillator unit and the receiving process of a high-frequency receiving device. Accordingly, an oscillator unit with large temperature coefficient is applicable to high-frequency receiving devices.
    Type: Grant
    Filed: July 28, 2008
    Date of Patent: October 18, 2011
    Assignee: Panasonic Corporation
    Inventors: Yasunobu Tsukio, Akihiko Namba, Hiroaki Ozeki
  • Patent number: 7991372
    Abstract: A radio receiver for diversity has a first receiving unit and a second receiving unit for diversity-receiving a signal of a radio frequency. The first receiving unit has a first mixer for converting the received signal of the radio frequency into an IF signal of a first intermediate frequency by an upper local method, and a first filter coupled to the output side of the first mixer. The second receiving unit has a second mixer for converting the received signal of the radio frequency into an IF signal of a second intermediate frequency by a lower local method, and a second filter coupled to the output side of the second mixer. The radio receiver can improve receiving sensitivity.
    Type: Grant
    Filed: February 8, 2007
    Date of Patent: August 2, 2011
    Assignee: Pansonic Corporation
    Inventors: Takeshi Fujii, Hiroaki Ozeki
  • Publication number: 20110181354
    Abstract: A reception device according to the present invention includes: a step-variable gain amplifier; and a controller operable to control the gain of the step-variable gain amplifier based on the signal quality value of a demodulator. The gain of the step-variable gain amplifier varies within N gains from a first gain to an N-th gain, and the controller changes a number of the gain one by one when changing the gain of the step-variable gain amplifier. Thus, it is possible to realize a reception device using the step-variable gain amplifier requiring a low control voltage as compared to a continuously-variable gain amplifier.
    Type: Application
    Filed: September 29, 2009
    Publication date: July 28, 2011
    Applicant: Panasonic Corporation
    Inventors: Takashi Umeda, Hiroaki Ozeki, Takeshi Fujii, Susumu Fukushima
  • Publication number: 20110122975
    Abstract: Demodulator includes reception quality evaluation circuit for evaluating the quality of a received signal by comparison with a first reference value, and outputting an evaluation signal; and driving circuit receiving the evaluation signal. If reception quality evaluation circuit evaluates that the quality of the received signal is acceptable, power supply from driving circuit to DC offset control loop is stopped. This offers a high-frequency receiver that reduces power consumption.
    Type: Application
    Filed: December 24, 2008
    Publication date: May 26, 2011
    Applicant: PANASONIC CORPORATION
    Inventors: Takashi Umeda, Hiroaki Ozeki, Akira Fujishima
  • Patent number: 7945228
    Abstract: A receiver has a first semiconductor chip and second semiconductor chip for receiving signals of a first radio frequency band, and a communication unit for performing communication using signals of a second radio frequency band. A second mixing unit in the second semiconductor chip uses second local signals supplied from a second local signal oscillator when the frequency of first local signals fed from a first-local-signal-output terminal to a first-local-signal-input terminal is within a predetermined range from the second frequency band, or uses first local signals supplied from the first-local-signal-input terminal when the frequency of the first local signals fed from the first-local-signal-output terminal to the first-local-signal-input terminal is out of the predetermined range from the second frequency band.
    Type: Grant
    Filed: April 18, 2007
    Date of Patent: May 17, 2011
    Assignee: Panasonic Corporation
    Inventors: Takeshi Fujii, Hiroaki Ozeki