Patents by Inventor Akihiko Yoshida

Akihiko Yoshida 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: 20100202342
    Abstract: A transmission area is specified flexibly in accordance with the contents of a flow. An area identification number (SHOG) is specified for each interlaced stream of wireless base stations. The same flow is sent at the same timing (or substantially at the same timing) in the interlaced stream specified for the same SHOG. A wireless terminal determines a neighbor sector or a neighbor wireless base station sending the same flow, in accordance with information given from the wireless base stations, and receives and combines the flows.
    Type: Application
    Filed: April 20, 2010
    Publication date: August 12, 2010
    Inventors: Akihiko YOSHIDA, Shiro Mazawa, Yosuke Takahashi, Daigo Takayanagi
  • Patent number: 7729309
    Abstract: A transmission area is specified flexibly in accordance with the contents of a flow. An area identification number (SHOG) is specified for each interlaced stream of wireless base stations. The same flow is sent at the same timing (or substantially at the same timing) in the interlaced stream specified for the same SHOG. A wireless terminal determines a neighbor sector or a neighbor wireless base station sending the same flow, in accordance with information given from the wireless base stations, and receives and combines the flows.
    Type: Grant
    Filed: October 12, 2006
    Date of Patent: June 1, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Yoshida, Shiro Mazawa, Yosuke Takahashi, Daigo Takayanagi
  • Patent number: 7724724
    Abstract: In order to realize such communication control as to reliably reconstruct communication information transmitted from a plurality of ANs at a plurality of ATs even when a BCMCS flow is added or deleted, a radio communication system includes a transmitter for transmitting control information necessary for the ATs to receive the communication information from a radio communication system at intervals of a predetermined period, and a controller for controlling to transmit a plurality of pieces of communication information to the ATs at intervals of a constant cycle and in synchronism with a transmission period of the control information.
    Type: Grant
    Filed: November 4, 2004
    Date of Patent: May 25, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Akihiko Yoshida, Shiro Mazawa, Kiyoshi Kawamoto, Yosuke Takahashi, Keiji Usuba
  • Publication number: 20100081436
    Abstract: In a conventional system, there is a possibility that human errors are generated in setting registration information because a maintenance engineer manually enters registration information into a session reference network controller which integrally controls access terminals and base stations. To improve the system, session reference network controller a session reference network controller stores the number of access terminals, N, in advance. And, when a “base distance” setting request is received from an access terminal via a base station, the session reference network controller or an OAM (Operation, Administration and Maintenance) server determines a base station, which is one of a plurality of controlled base stations and is Nth nearest from the base station that has transmitted the setting request, and sets the distance between the base station, which has transmitted the setting request, and the base station, which is Nth nearest, as the “base distance”.
    Type: Application
    Filed: June 18, 2009
    Publication date: April 1, 2010
    Inventors: Shigeyasu KUBO, Yosuke Takahashi, Akihiko Yoshida, Daigo Takayanagi
  • Patent number: 7687184
    Abstract: In a conventional polymer membrane electrode assembly, particularly when operated for a long period of time, a portion of the polymer electrolyte membrane to be in contact with the gas diffusion layer has suffered significant degradation. In order to address this, in a membrane electrode assembly including a hydrogen ion conductive polymer electrolyte membrane, a pair of catalyst layers arranged on both surfaces of the polymer electrolyte membrane, and a pair of gas diffusion layers, each including a fibrous substrate, arranged on the outer surfaces of the catalyst layers, a thickness TA of a center portion that faces the catalyst layer and a thickness TB of a peripheral portion surrounding the center portion are set to satisfy a expression (1): 0.7?TB/TA?0.9.
    Type: Grant
    Filed: September 22, 2005
    Date of Patent: March 30, 2010
    Assignee: Panasonic Corporation
    Inventors: Masaki Yamauchi, Yoshihiro Hori, Akihiko Yoshida, Mikiko Yoshimura, Makoto Uchida
  • Publication number: 20090296631
    Abstract: An aggregation device performs a synchronous processing so that a synchronous delivery may be made from a plurality of base stations through a broadcasting channel. A BSN (104) gives, when it sends broadcasting data for the synchronous delivery to an AN (102) and an AN (103), a period number and a sequence number are added to the broadcasting data so that the data to be sent from the AN (102) and the AN (103 can be synchronously delivered.
    Type: Application
    Filed: December 19, 2005
    Publication date: December 3, 2009
    Inventors: Yosuke Takahashi, Shiro Mazawa, Akihiko Yoshida, Daigo Takayanagi
  • Patent number: 7622215
    Abstract: To provide a polymer electrolyte membrane having excellent size stability and excellent mechanical strength that can sufficiently prevent the size change due to the swelling condition, the displacement of the polymer electrolyte membrane and the formation of wrinkles during the production of the polymer electrolyte fuel cell, and can prevent damage during the production and operation of the polymer electrolyte fuel cell. In a composite electrolyte membrane including a porous reinforcement layer made of a resin and an electrolyte layer made of a polymer electrolyte and laminated at least one main surface of the reinforcement layer, the direction having a high tensile modulus of elasticity in the reinforcement layer is substantially corresponded with the direction having a high rate of size change in the electrolyte layer.
    Type: Grant
    Filed: March 4, 2005
    Date of Patent: November 24, 2009
    Assignees: Panasonic Corporation, Asahi Glass Co., Ltd.
    Inventors: Yoshihiro Hori, Akihiko Yoshida, Mikiko Yoshimura, Makoto Uchida, Shinji Kinoshita, Hirokazu Wakabayashi
  • Patent number: 7621807
    Abstract: The purpose of the present invention is to satisfy the following: (1) it prevents the adsorption of antibacterial agent to the filter during storage, (2) for this reason, makes the container and the filter separable and furthermore makes it easy to fix the container, and (3) makes it possible to change the filter and the antibacterial agent respectively separately with simple operations. The fixing mechanism of the container in which an antibacterial agent has been sealed according to the present invention is a fixing mechanism for a container in which an antibacterial agent is sealed in a vehicle air conditioning device. And, fixing means 53 are provided for removably fixing the container 31 to the lid 51 which opens and closes the inlet/outlet port 50 of the filter unit 30.
    Type: Grant
    Filed: January 4, 2006
    Date of Patent: November 24, 2009
    Assignee: Valeo Systemes Thermiques S.A.S.
    Inventors: Shinichi Hara, Akihiko Yoshida, Takao Koike
  • Publication number: 20090180420
    Abstract: A slave station which transmits/receives signals to/from a master station, the slave station includes: a transmitting unit and receiving unit for transmitting/receiving signals regarding the master station; a storing unit; an input unit; wherein under a control by a control unit, the transmitting unit transmits a transmission request for transmitting multicast data to the master station in accordance with a timing of power-on or an input by the input unit; the receiving unit receives information of a number of times of transmission for requested multicast data from the master station and stores the number in the storing unit; and after receiving the multicast data the number of times of transmission stored in the storing unit, the control unit determines presence of absence of lacking data which have not been received and, transmits a retransmission request for requesting the lacking data in a case of presence the lacking data.
    Type: Application
    Filed: March 26, 2009
    Publication date: July 16, 2009
    Inventors: Daigo TAKAYANAGI, Shiro MAZAWA, Yosuke TAKAHASHI, Akihiko YOSHIDA
  • Publication number: 20090180419
    Abstract: An information transmitting method including; determining, on a basis of a packet error rate from a master station to slave stations, a number of times of multicast transmission in accordance with an expected value of a number of slave stations that transmit a retransmission request, an expected value of a number of retransmitted packets responding to the retransmission request, or a probability that the slave stations receive all packets forming information; notifying determined number of times of multicast transmission to the slave stations; and transmitting, to plural slave stations in multicast, same information formed of plural packets the determined times of multicast transmission.
    Type: Application
    Filed: March 26, 2009
    Publication date: July 16, 2009
    Inventors: Daigo TAKAYANAGI, Shiro MAZAWA, Yosuke TAKAHASHI, Akihiko YOSHIDA
  • Patent number: 7560180
    Abstract: To provide a gas diffusion layer excellent in micro short-circuit resistance and anti-flooding characteristics by optimizing the surface shape of a gas diffusion layer. In a gas diffusion layer for a gas diffusion electrode including at least a catalyst layer containing an electrode catalyst and a gas diffusion layer having electron conductivity and gas diffusibility, a second surface of the gas diffusion layer, which is positioned opposite to a first surface thereof to be in contact with the catalyst layer, is made rougher than the first surface. The first surface has a maximum height Ry1 of 10 to 50 determined by JIS B 0601 surface roughness measurement method, and the second surface has a maximum height Ry2 of 100 to 500 determined by JIS B 0601 surface roughness measurement method.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: July 14, 2009
    Assignee: Panasonic Corporation
    Inventors: Akihiko Yoshida, Masaki Yamauchi, Yoshihiro Hori, Makoto Uchida
  • Publication number: 20090047555
    Abstract: In a fuel cell system, during the state where the fuel cell system is not generating an electric power, a fuel gas passage and an oxidizing gas passage are closed, and an inert gas supply device (54, 58) supplies an inert gas to an anode space (111) which is substantially isolated from outside, the anode space including the closed fuel gas passage and a space connected to the closed fuel gas passage, while an air supply device (67, 70) supplies air to a cathode space (112) which is substantially isolated from outside, the cathode space including the closed oxidizing gas passage and a space connected to the closed oxidizing gas passage. With this, the fuel cell system is capable of achieving high energy efficiency and of surely preventing degradation of electrodes during the state where the fuel cell system is not generating the electric power, irrespective of repeated start-up and stop.
    Type: Application
    Filed: November 28, 2006
    Publication date: February 19, 2009
    Inventors: Yasushi Sugawara, Takayuki Urata, Takahiro Umeda, Akihiko Yoshida, Soichi Shibata, Junji Morita
  • Publication number: 20090023382
    Abstract: A radio communication system includes a grouping unit for grouping a plurality of base stations into a plurality of groups (Soft Handoff Groups) and a determining unit for selecting base stations belonging to one and the same group selected from the groups produced by the grouping unit and for determining the base stations as base stations to send communication packets to an access terminal.
    Type: Application
    Filed: September 23, 2008
    Publication date: January 22, 2009
    Applicant: Hitachi Communication Technologies, Ltd.
    Inventors: Akihiko YOSHIDA, Shiro Mazawa, Kiyoshi Kawamoto, Yosuke Takahashi, Keiji Usuba
  • Patent number: 7473486
    Abstract: An object of the present invention is to provide a catalyst-coated membrane suitable for achieving a polymer electrolyte fuel cell that sufficiently prevents a decrease in the initial characteristics and also exhibits sufficient cell performance for a long period of time and has excellent durability. In at least the cathode catalyst layer, the ratio (WP/WCat-C) of the weight of the polymer electrolyte (WP) to the weight of the catalyst-carrying carbon (WCat-C) is decreased from an innermost layer positioned closest to the polymer electrolyte membrane toward an outermost layer positioned farthest from the polymer electrolyte membrane. The ratio (WP/WCat-C) in the innermost layer is 0.8 to 3.0, and the ratio (WP/WCat-C) in the outermost layer is 0.2 to 0.6.
    Type: Grant
    Filed: January 26, 2005
    Date of Patent: January 6, 2009
    Assignees: Panasonic Corporation, Asahi Glass Co., Ltd.
    Inventors: Mikiko Yoshimura, Yoshihiro Hori, Yoichiro Tsuji, Akihiko Yoshida, Takeshi Yonamine, Makoto Uchida
  • Patent number: 7470483
    Abstract: A carbon fiber woven fabric for use as a gas diffusion layer base material in a polymer electrolyte fuel cell has a surface that is smoothed and further optimized to inhibit non-uniform infiltration of a coating for water-repellent-layer formation, to provide an electrolyte membrane-electrode assembly suitable for operation under a high humidification condition. The gas diffusion layer base material may be a carbon fiber woven fabric, wherein a ratio of the area of gap portions where neither warp thread nor weft thread exists: (10/W?Y)(10/Z?X) to the area of portions where warp thread is crossing weft thread: XY mm2 is in the range of about 1/1500 to about 1/5, where the carbon fiber woven fabric has a warp density of Z threads/cm, a weft density of W threads/cm, a warp thickness of X mm and a weft thickness of Y mm.
    Type: Grant
    Filed: December 9, 2003
    Date of Patent: December 30, 2008
    Assignee: Panasonic Corporation
    Inventors: Akihiko Yoshida, Yoshihiro Hori, Osamu Sakai, Makoto Uchida, Eiichi Yasumoto, Shinya Kosako
  • Publication number: 20080311462
    Abstract: In a conventional polymer membrane electrode assembly, particularly when operated for a long period of time, a portion of the polymer electrolyte membrane to be in contact with the gas diffusion layer has suffered significant degradation. In order to address this, in a membrane electrode assembly including a hydrogen ion conductive polymer electrolyte membrane, a pair of catalyst layers arranged on both surfaces of the polymer electrolyte membrane, and a pair of gas diffusion layers, each including a fibrous substrate, arranged on the outer surfaces of the catalyst layers, a thickness TA of a center portion that faces the catalyst layer and a thickness TB of a peripheral portion surrounding the center portion are set to satisfy a expression (1): 0.7?TB/TA?0.9.
    Type: Application
    Filed: September 22, 2005
    Publication date: December 18, 2008
    Inventors: Masaki Yamauchi, Yoshihiro Hori, Akihiko Yoshida, Mikiko Yoshimura, Makoto Uchida
  • Patent number: 7455703
    Abstract: The present invention provides a polymer electrolyte fuel cell having an increased reaction area by forming a gas channel, a proton channel and an electron channel very close to each other inside a catalyst layer. This polymer electrolyte fuel cell includes a hydrogen ion conductive polymer electrolyte membrane; and a pair of electrodes having catalyst layers sandwiching the hydrogen ion conductive polymer electrolyte membrane between them and gas diffusion layers in contact with the catalyst layers, in which the catalyst layer of at least one of the electrodes comprises carbon particles supporting a noble metal catalyst, and the carbon particles include at least two kinds of carbon particles adsorbing a hydrogen ion conductive polymer electrolyte in mutually different dispersed states.
    Type: Grant
    Filed: June 20, 2006
    Date of Patent: November 25, 2008
    Assignee: Panasonic Corporation
    Inventors: Makoto Uchida, Yasushi Sugawara, Eiichi Yasumoto, Akihiko Yoshida, Junji Morita, Masao Yamamoto, Shinya Kosako, Osamu Sakai, Yoshihiro Hori
  • Publication number: 20080242303
    Abstract: In a radio communication system in which sequence numbers of radio packets transmitted to first and second radio base stations are managed independently to perform hand-off, when the hand-off is performed while a plurality of fragmented radio packets are transmitted, a mobile device applies sequence numbers of radio packets managed by the first radio base station after the hand-off is performed and applies sequence numbers of radio packets managed by the second radio base station after completion of transmission of the plurality of radio packets. The radio base station managing radio packets is identified on the basis of the sequence numbers managed in each base station upon restoration and data is restored.
    Type: Application
    Filed: January 31, 2008
    Publication date: October 2, 2008
    Inventors: Yosuke TAKAHASHI, Akihiko Yoshida, Daigo Takayanagi, Shiro Mazawa
  • Publication number: 20080210094
    Abstract: The object of the present invention is to provide a package of a volatile substances which comprises a bag having a volatile substance with an antibacterial action enclosed therein, and a case having the bag enclosed therein, wherein the case is allowed to have a size and shape complying with the amount of a volatile substance having permeated the bag so that the shape of the case can be adapted to the volumes and shapes of various air conditioners, while the volatile substance can be volatilized at a predetermined rate.
    Type: Application
    Filed: April 12, 2005
    Publication date: September 4, 2008
    Applicants: Valeo Thermal Systems Japan Corporation, Valeo Systems Thermiques, Rengo Co., Ltd.
    Inventors: Shinichi Hara, Akihiko Yoshida, Frederic Giraud, Frederic Ladrech, Yoshie Aoki, Masumi Yamaguchi, Kiyoshi Kamei, Hidenao Saito
  • Publication number: 20080205361
    Abstract: The present invention provides a wireless communication system and a terminal. A base station includes means that notifies terminals of an intensity of a received interference power. The terminal includes means that controls a transmission power for transmitting data to the base station, which is one of base stations and to which data is to be transmitted, by referencing an intensity of interference power (OSI) notified from base stations to which data is not to be transmitted. The means that controls a transmission power calculates a decision value for increasing/decreasing the transmission power, wherein the decision value is variable according to the current transmission power of the terminal and propagation attenuations between the terminal and the base stations to which data is not to be transmitted, and variably controls the amount of transmission power increase/decrease according to the decision value for increasing/decreasing a transmission power.
    Type: Application
    Filed: August 23, 2007
    Publication date: August 28, 2008
    Inventors: Keisuke Takeuchi, Toshiyuki Saito, Rintaro Katayama, Shiro Mazawa, Akihiko Yoshida