Patents by Inventor Takao Nakagawa

Takao Nakagawa 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: 20100020734
    Abstract: A base transceiver station that is communicable with a plurality of user equipment s includes a receiving unit that receives battery information of the user equipment, and a controller that controls allocation of radio resources to be used to transmit data addressed to the plurality of user equipments based on the battery information received by the receiving unit.
    Type: Application
    Filed: July 21, 2009
    Publication date: January 28, 2010
    Applicant: FUJITSU LIMITED
    Inventors: Takao NAKAGAWA, Hiroyuki SEKI, Kotaro SHIIZAKI
  • Patent number: 7622896
    Abstract: The future intra-terminal temperature is estimated on the basis of present intra-terminal temperature and a present service state of the terminal. In addition, the charging of the battery unit is controlled on the basis of the estimated future intra-terminal temperature.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: November 24, 2009
    Assignee: NEC Corporation
    Inventor: Takao Nakagawa
  • Publication number: 20090238126
    Abstract: A communication system includes a mobile station and a base station. The mobile station calculates estimated TA information based on the position of the mobile station and an amount of propagation path delay. The mobile station determines, based on TA information transmitted from the base station and the estimated TA information, whether the TA information is addressed thereto. The mobile station determines whether to transmit “Message 3” to the base station depending on determination results, and transmits “Message 3” when the TA information is addressed thereto.
    Type: Application
    Filed: February 4, 2009
    Publication date: September 24, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Tomonori SATO, Toshio Kawasaki, Takao Nakagawa
  • Publication number: 20090219877
    Abstract: A communication apparatus for communicating via a frame containing a plurality of first type blocks into which pilot information is inserted and a plurality of second type blocks into which control information or data is inserted, the communication apparatus including a channel estimation accuracy predicting unit for predicting channel estimation accuracy of each of the plurality of second type blocks based on channel estimate values of the plurality of first type blocks in the frame. The communication apparatus includes an allocation determining unit for determining an allocation based on priority information containing a priority of each type of the control information and data such that control information or data of a higher-priority type is inserted into a block among the plurality of second type blocks with higher channel estimation accuracy.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 3, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Kotaro SHIIZAKI, Takao NAKAGAWA, Hitoshi YOKOYAMA, Kazuo KAWABATA
  • Publication number: 20090161786
    Abstract: A transmitter for use in digital radio communications systems includes: a bit corrector controls bit arrangement in such a manner that a code having high significance, out of multiple codes obtained by coding, is allocated with high priority to a bit having a tendency that the likelihood enlarges at the time of symbol decision on a receiver; a multi-level modulator allocates the code to the multiple bits in accordance with a predetermined symbol arrangement; and a symbol arrangement controller controls the symbol arrangement from equal distance arrangement to another arrangement in accordance with a ratio of the codes different in significance. To control symbol arrangement increases the effect of bit correction and improves an error rate on the receiver.
    Type: Application
    Filed: June 25, 2008
    Publication date: June 25, 2009
    Applicant: FUJITSU LIMITED
    Inventors: Takao NAKAGAWA, Tetsuya YANO, Kazuhisa OBUCHI
  • Patent number: 7443271
    Abstract: In order to provide a band pass filter for high wavelength which has a wideband, small insertion loss and flat passband and obtains steep attenuation, a plurality of ring filters, in which, an input terminal of a high-frequency signal is provided to an arbitrary point on a line in a microstripline ring resonator having the line with one wavelength at electrical length, an output terminal is provided to a point positioned at a half wavelength at electrical length from the input terminal, a open stub of ¼ wavelength at electrical length (or ½ wavelength short stub) is connected to a point positioned at ¼ wavelength at electrical length from the input terminal, are connected by cascade connection with attenuation pole frequencies being different.
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: October 28, 2008
    Assignee: The Circle for the Promotion of Science and Engineering
    Inventors: Kiyomichi Araki, Hitoshi Ishida, Takao Nakagawa
  • Publication number: 20080070615
    Abstract: A mobile user terminal (UE), which measures downlink channel quality, and which transmits downlink quality information indicating the measured downlink channel quality and an uplink pilot signal to be used for measuring uplink channel quality to a base station (BS), comprises a transmit time control unit (216), which synchronizes transmit time of the downlink quality information and transmit time of the uplink pilot signal relative to each other. And/or the mobile user terminal (UE) comprises a radio transmitting unit (212) which transmits the downlink quality information and the uplink pilot signal by using the same carrier frequency or by using adjacent carrier frequencies selected from among a plurality of preassigned carrier frequencies.
    Type: Application
    Filed: August 24, 2007
    Publication date: March 20, 2008
    Inventors: Kazuhisa Obuchi, Tetsuya Yano, Shunji Miyazaki, Takao Nakagawa
  • Publication number: 20080062935
    Abstract: Provided is a preamble receiving apparatus, including: a receiving unit receiving from a transmitting apparatus a frame having a format which contains a preamble section and a margin section subsequent to the preamble section; and a reception processing unit detecting a preamble signal which is transmitted in the preamble section in the transmitting apparatus from the received frame, wherein the reception processing unit includes: a correlation processing unit which defines as a search section a time having a predetermined starting point and which is equal to or shorter than the margin section, and creates a power profile for each of divided sections through a correlating process operation related to a plurality of divided sections obtained by dividing the search section; and a coupled profile creating unit for creating a coupled power profile by coupling the power profile for each of the divided sections to each other.
    Type: Application
    Filed: February 5, 2007
    Publication date: March 13, 2008
    Inventors: Takao Nakagawa, Tsuyoshi Shimomura, Ryusuke Kiryu
  • Publication number: 20070205076
    Abstract: A friction member for a frictional engagement device is provided in which weight is reduced, impact resistance is enhanced and sliding resistance is improved; and also provided is a method for producing the same. As a friction member (10) for a frictional engagement device, a friction member made of a carbon fiber/carbonaceous composite material is provided which is obtained by implementing a heat treatment on a precursor, the precursor comprising a matrix composed of a carbon binder and an additive and carbon fiber dispersed in the matrix, wherein a porosity of the friction member is 20-60%.
    Type: Application
    Filed: March 29, 2005
    Publication date: September 6, 2007
    Inventors: Atsushi Takahashi, Satoshi Yoshida, Kentaro Komori, Yorinori Kumagai, Takao Nakagawa, Mihoko Yamashita
  • Publication number: 20070063794
    Abstract: In order to provide a band pass filter for high wavelength which has a wideband, small insertion loss and flat passband and obtains steep attenuation, a plurality of ring filters, in which, an input terminal of a high-frequency signal is provided to an arbitrary point on a line in a microstripline ring resonator having the line with one wavelength at electrical length, an output terminal is provided to a point positioned at a half wavelength at electrical length from the input terminal, a open stub of ¼ wavelength at electrical length (or ½ wavelength short stub) is connected to a point positioned at ¼ wavelength at electrical length from the input terminal, are vertically connected with attenuation pole frequencies being different.
    Type: Application
    Filed: February 20, 2004
    Publication date: March 22, 2007
    Inventors: Kiyomichi Araki, Hitoshi Ishida, Takao Nakagawa
  • Publication number: 20060248700
    Abstract: A carbon-carbon composite plate (1) for stamping is provided, the carbon-carbon composite plate having a porosity P of 20% or greater, and the stamping being carried out in the absence of water, or the carbon-carbon composite plate having a porosity P of 10% or greater, and the stamping being carried out in the presence of water. This enables an intact plate-shaped member to be obtained by stamping.
    Type: Application
    Filed: July 5, 2006
    Publication date: November 9, 2006
    Inventors: Atsushi Takahashi, Yorinori Kumagai, Takao Nakagawa, Mihoko Yamashita
  • Publication number: 20060001405
    Abstract: The future intra-terminal temperature is estimated on the basis of present intra-terminal temperature and a present service state of the terminal. In addition, the charging of the battery unit is controlled on the basis of the estimated future intra-terminal temperature.
    Type: Application
    Filed: July 5, 2005
    Publication date: January 5, 2006
    Inventor: Takao Nakagawa
  • Publication number: 20050158509
    Abstract: A carbon-carbon composite plate (1) for stamping is provided, the carbon-carbon composite plate having a porosity P of 20% or greater, and the stamping being carried out in the absence of water, or the carbon-carbon composite plate having a porosity P of 10% or greater, and the stamping being carried out in the presence of water. This enables an intact plate-shaped member to be obtained by stamping.
    Type: Application
    Filed: February 19, 2003
    Publication date: July 21, 2005
    Inventors: Atsushi Takahashi, Yorinori Kumagai, Takao Nakagawa
  • Publication number: 20040257561
    Abstract: A sampling apparatus of a minute sample for a microscopic analysis includes a frame fixed at a prescribed position relative to the object lens of an optical microscope; a moving member supported with the frame so as to be reciprocatably movable between a sampling position and a waiting position; a member for holding the moving member at the waiting position; and a device for adjusting the position of a sampling needle relative to the moving member whereby the tip of the sampling needle is situated at focus position of the object lens when the moving member is moved to the sampling position. The sampling needle is adjustable relative to the moving member.
    Type: Application
    Filed: May 4, 2004
    Publication date: December 23, 2004
    Inventors: Takao Nakagawa, Toshiyuki Fuyuki
  • Patent number: 6620074
    Abstract: A planetary gear type center differential unit contains a carrier, a first sun gear and a second sun gear provided interiorly of the carrier, a first and second pinions respectively meshing with the first and the second sun gears, a pinion member having a shaft-receiving hole and carrying the first pinion and the second pinion therearound, and a pinion shaft made of carbon/carbon composite. The pinion shaft is supported by the carrier at one end and is inserted into the shaft-receiving hole of the pinion member, so that the pinion shaft directly supports the pinion member so as to rotate.
    Type: Grant
    Filed: April 26, 2002
    Date of Patent: September 16, 2003
    Assignee: Fuji Jukogyo Kabushiki Kaisha
    Inventors: Kazuo Kanazawa, Hiroshi Ishihara, Shin Kurosaki, Takao Nakagawa, Hirotaka Sato
  • Publication number: 20020160875
    Abstract: A planetary gear type center differential unit contains a carrier, a first sun gear and a second sun gear provided interiorly of the carrier, a first and second pinions respectively meshing with the first and the second sun gears, a pinion member having a shaft-receiving hole and carrying the first pinion and the second pinion therearound, and a pinion shaft made of carbon/carbon composite. The pinion shaft is supported by the carrier at one end and is inserted into the shaft-receiving hole of the pinion member, so that the pinion shaft directly supports the pinion member so as to rotate.
    Type: Application
    Filed: April 26, 2002
    Publication date: October 31, 2002
    Inventors: Kazuo Kanazawa, Hiroshi Ishihara, Shin Kurosaki, Takao Nakagawa, Hirotaka Sato
  • Patent number: 6472058
    Abstract: A fiber-composite material includes: 55-75 wt % of carbon, 1-10 wt % of silicon and 10-50 wt % of silicon carbide, and the matrices including Si—SiC-based materials formed integrally among assemblages of yarns include carbon fibers integrally formed and combined three-dimensionally so as not to separate from each other. The fiber-composite material has a coefficient of kinetic friction of 0.05-0.6 and a porosity of 0.5-10%.
    Type: Grant
    Filed: December 14, 1998
    Date of Patent: October 29, 2002
    Assignees: NGK Insulators, Ltd., Across Co., Ltd.
    Inventors: Shigeru Hanzawa, Tsuneo Komiyama, Takao Nakagawa, Mihoko Yamashita
  • Patent number: 6447893
    Abstract: A fiber-composite material (7) is comprised of a yarn aggregate (6) in which yam (2A, 2B) including at least a bundle (3) of carbon fiber and a carbon component other than carbon fiber is three-dimensionally combined and integrally formed without separation from each other; and a matrix made of Si—SiC-based materials (4A, 4B, 5A, 5B) filled between the yarn (2A, 2B) adjacent to each other within the yarn aggregate (6).
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: September 10, 2002
    Assignees: NGK Insulators, Ltd., Across Co., Ltd.
    Inventors: Shigeru Hanzawa, Takao Nakagawa
  • Publication number: 20020064886
    Abstract: A sampling apparatus which makes ready collection of a minute sample for a microscopic analysis possible, and which comprises a frame (1) fixed at a prescribed position relative to the object lens of an optical microscope (M); a moving member (15) supported with the fixed frame (1) so as to be reciprocatably movable between a sampling position and a waiting position; a member (17) for holding the moving member (15) at the waiting position; a device (11e, 21, 22) for adjusting the position of a sampling needle (23) relative to the moving member (15) so that the tip of the sampling needle (23) is situated at the focus position of the object lens of the optical microscope (M) in the state wherein the moving member (15) was moved to the sampling position: and means (24) for fixing the sampling needle (23) to the moving member (15) in the state wherein the position of the sampling needle (23) relative to the moving member (15) was adjusted.
    Type: Application
    Filed: May 22, 2001
    Publication date: May 30, 2002
    Inventors: Takao Nakagawa, Toshiyuki Fuyuki
  • Patent number: 6377759
    Abstract: A process cartridge detachably mountable to an electrophotographic image forming apparatus main body includes an electrophotographic photosensitive member, a process device acting on the electrophotographic photosensitive member, a measuring electrode member disposed in a part contacting developer and provided with an input side electrode and an output side electrode having at least a pair of portions disposed in parallel with a fixed interval, a reference electrode member disposed in a part not contacting the developer and provided with an input side electrode and an output side electrode having at least a pair of portions disposed in parallel with a fixed interval, an output contact for a measuring electrode electrically connected to the output side electrode of the measuring electrode member, an output contact for a reference electrode electrically connected to the output side electrode of the reference electrode member, and an input contact electrically connected to the input side electrodes of the measur
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: April 23, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Daisuke Abe, Kazushi Watanabe, Toru Oguma, Takao Nakagawa