Patents by Inventor Seiji Hagiwara
Seiji Hagiwara 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: 12244775Abstract: A sound diagnosis system includes: a setting unit configured to set a threshold for each of a plurality of time sections, based on a sound wave level in each of the plurality of time sections of a plurality of first sound data classified in a first group; and a determination unit configured to determine whether or not an abnormal sound is generated by calculating a comparison value for each of the plurality of time sections based on a sound wave level in each of the plurality of time sections of one or more second sound data classified in the first group, and comparing the comparison value for each of the plurality of time sections with the threshold value of the corresponding time section of the first group, the threshold value being set by the setting unit.Type: GrantFiled: March 10, 2023Date of Patent: March 4, 2025Assignee: Canon Kabushiki KaishaInventors: Yohei Suzuki, Seiji Hara, Hiroshi Hagiwara
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Patent number: 11356862Abstract: A measuring method executes an identifying procedure of measuring signal power of a beam from user equipment supporting beam-formed transmission, identifying a measurement antenna that detects a peak of the beam transmitted from the user equipment; a calculating procedure of calculating a first angle formed between a straight line connecting the measurement antenna detecting the peak of the beam transmitted from the user equipment to the user equipment and a straight line connecting a measurement antenna located in a direction of an azimuth angle rotation axis of the user equipment to the user equipment; and a rotating procedure of rotating the user equipment based on the first angle.Type: GrantFiled: May 21, 2019Date of Patent: June 7, 2022Assignee: NTT DOCOMO, INC.Inventors: Takayuki Furuta, Seiji Hagiwara
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Publication number: 20210227399Abstract: A measuring method executes an identifying procedure of measuring signal power of a beam from user equipment supporting beam-formed transmission, identifying a measurement antenna that detects a peak of the beam transmitted from the user equipment; a calculating procedure of calculating a first angle formed between a straight line connecting the measurement antenna detecting the peak of the beam transmitted from the user equipment to the user equipment and a straight line connecting a measurement antenna located in a direction of an azimuth angle rotation axis of the user equipment to the user equipment; and a rotating procedure of rotating the user equipment based on the first angle.Type: ApplicationFiled: May 21, 2019Publication date: July 22, 2021Applicant: NTT DOCOMO, INC.Inventors: Takayuki Furuta, Seiji Hagiwara
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Patent number: 7088977Abstract: A wireless communication apparatus is provided in which a wireless part receives multipath detection information sent from a wireless communication apparatus at the other end (a mobile station, for example) and provides the multipath detection information to a multipath component canceling signal generation part. The multipath component canceling signal generation part generates a multipath component canceling signal based on the multipath detection information, and provides the multipath component canceling signal to the wireless part. The wireless part sends the multipath component canceling signal with a send wave to the wireless communication apparatus at the other end.Type: GrantFiled: May 23, 2001Date of Patent: August 8, 2006Assignee: NTT DoCoMo, Inc.Inventors: Ryuusuke Kaneda, Seiji Hagiwara, Tadao Takami
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Patent number: 6343218Abstract: A mobile station according to the present invention that is capable of connecting simultaneously to a plurality of base stations comprises a reception radio portion and TPC bit detecting portions, for receiving and detecting TPC bits (transmission power control signals) from the plurality of base stations during soft handover; a combining portion, for combining the detected TPC bits to determine a combination signal; and a transmission power control deciding portion, for controlling the transmission power of the mobile station based on the combination signal determined by the combining portion. A method according to the present invention governs use of the mobile station hereof.Type: GrantFiled: September 16, 1999Date of Patent: January 29, 2002Assignee: NTT Docomo Inc.Inventors: Ryusuke Kaneda, Seiji Hagiwara, Akihiro Higashi
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Publication number: 20020006775Abstract: A wireless communication apparatus is provided in which a wireless part receives multipath detection information sent from a wireless communication apparatus at the other end (a mobile station, for example) and provides the multipath detection information to a multipath component canceling signal generation part. The multipath component canceling signal generation part generates a multipath component canceling signal based on the multipath detection information, and provides the multipath component canceling signal to the wireless part. The wireless part sends the multipath component canceling signal with a send wave to the wireless communication apparatus at the other end.Type: ApplicationFiled: May 23, 2001Publication date: January 17, 2002Applicant: NTT DoCoMo, Inc.Inventors: Ryuusuke Kaneda, Seiji Hagiwara, Tadao Takami
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Patent number: 6265935Abstract: In a radio transmission amplifier unit which has between input and output terminals a gain-controlled amplifier 11, a pre-amplifier 12 connected to the output thereof and a main amplifier 13 supplied with the output therefrom, the range of the transmitting power level is divided into small, medium and large regions.Type: GrantFiled: October 18, 1999Date of Patent: July 24, 2001Assignee: NTT Mobile Communications Network Inc.Inventors: Ryuusuke Kaneda, Seiji Hagiwara, Tadao Takami
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Patent number: 5917450Abstract: An antenna device having two resonance frequencies wherein two radiating patches are respectively provided on one surface and on the other surface of a dielectric plate which is disposed above a ground plate with a space interposed therebetween. A coupling control capacitor element is connected between these two radiating patches and resonance control capacitor elements are connected between the radiating patches and the ground plate, respectively. Capacitance of the coupling control capacitor element is selected such that a current coupled from one of the two radiating patches to the other and a current supplied from the said one of the radiating patches to the other via the coupling control capacitor element are in opposite phase at the other one of the radiating patches.Type: GrantFiled: November 22, 1996Date of Patent: June 29, 1999Assignee: NTT Mobile Communications Network Inc.Inventors: Koichi Tsunekawa, Seiji Hagiwara
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Patent number: 5767810Abstract: In a microstrip antenna device which has a radiating patch and a ground plate disposed opposite and in parallel to each other, a metal plate is provided on the ground plate in the vicinity of at least one of the opposite marginal edges of the radiating patch in the direction of resonance to form an added capacitance between an open end of the radiating patch in the direction of resonance and the ground plate, thereby permitting reduction of the antenna length.Type: GrantFiled: July 24, 1996Date of Patent: June 16, 1998Assignee: NTT Mobile Communications Network Inc.Inventors: Seiji Hagiwara, Koichi Tsunekawa
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Patent number: 5617105Abstract: A rod antenna element is connected at its lower end to one end of a coaxial impedance converter, the other end of which is connected to a feeder. A coil antenna element is capacitively coupled to the rod antenna element to provide a double resonance characteristic. When held at its retracted position, the rod antenna element, inserted in an outer conductor of the coaxial impedance converter, may preferably form an inner conductor larger in diameter than that when the rod antenna element is at its extended-out position, and the rod antenna element is connected to a coil antenna element with a low impedance.Type: GrantFiled: September 23, 1994Date of Patent: April 1, 1997Assignee: NTT Mobile Communications Network, Inc.Inventors: Koichi Tsunekawa, Seiji Hagiwara
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Patent number: 5568155Abstract: Double-resonance characteristics are obtained with a small and simple construction by arranging a conductive planar radiation element approximately parallel to a conductive ground plane with an intermediary insulator, connecting a feed line to these, and further connecting a parasitic line to a separate contact point at a distance from the contact point of the feed line.Type: GrantFiled: November 7, 1994Date of Patent: October 22, 1996Assignee: NTT Mobile Communications Network IncorporationInventors: Koichi Tsunekawa, Seiji Hagiwara