Patents by Inventor Katsumi Sakurai

Katsumi Sakurai 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: 10390282
    Abstract: In a wireless communication system that includes a plurality of wireless terminals each of which has a first device type and transmits data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type and relays the data that is received in wireless communication with each wireless terminal to the destination, each of the plurality of wireless terminals detects a wireless frame, receives data contained in the wireless frame when the detected wireless frame contains information that represents the first device type, and avoids receiving data contained in the wireless frame when the detected wireless frame contains information that represents the second device type.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: August 20, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Katsumi Sakurai, Yuji Takahashi, Takashi Higashinakagawa, Yasuyuki Kawaida, Tadashige Iwao
  • Patent number: 10382317
    Abstract: A transfer destination selecting method conducted by a communication device includes selecting, when the communication device stores, according to a destination, pieces of information indicating a plurality of other communication devices that are candidates for a transfer destination of data, one of the other communication devices to be the transfer destination from among the candidates on the basis of a number of destinations in a routing table used for controlling a data transfer and stored in each of the plurality of other communication devices.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: August 13, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Takashi Aoki, Ryo Mibu, Katsumi Sakurai, Tadashige Iwao
  • Publication number: 20180270329
    Abstract: A method for visualization of a communication path includes: executing, by a processor of the node apparatus, a wireless communication processing that includes receiving a first frame transmitted wirelessly from a first node apparatus or a terminal apparatus, the first frame including first time information indicating a timing to cause the light emitting device to emit light, and performing at least either one of processing to utilize the path information to transmit the received first frame to a second node apparatus according to the path information and processing to terminate the received first frame according to the path information; executing, by the processor of the node apparatus, an application processing that includes causing the light emitting device to emit light, based on the first time information included in the first frame.
    Type: Application
    Filed: March 5, 2018
    Publication date: September 20, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Katsumi SAKURAI, Masataka Sato, Yuji TAKAHASHI
  • Patent number: 9973414
    Abstract: A method executed by a wireless communication device used in a wireless ad hoc network includes: designating a bit in a loop detection array added to a received frame in accordance with identification information of the wireless communication device; deciding that a route in which the received frame has been transmitted is not a loop when the bit designated in the loop detection array is not used; deciding that the route is a loop when the bit designated in the loop detection array is used; updating the bit designated in the loop detection array to a state of being used and transmitting the received frame toward a destination node when it is decided that the route is not a loop; and returning the received frame to an adjacent node that is a local transmission source of the received frame when it is decided that the route is a loop.
    Type: Grant
    Filed: December 7, 2015
    Date of Patent: May 15, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Takashi Higashinakagawa, Katsumi Sakurai, Yuji Takahashi, Tadashige Iwao
  • Publication number: 20170005936
    Abstract: A transfer destination selecting method conducted by a communication device includes selecting, when the communication device stores, according to a destination, pieces of information indicating a plurality of other communication devices that are candidates for a transfer destination of data, one of the other communication devices to be the transfer destination from among the candidates on the basis of a number of destinations in a routing table used for controlling a data transfer and stored in each of the plurality of other communication devices.
    Type: Application
    Filed: June 9, 2016
    Publication date: January 5, 2017
    Inventors: Takashi AOKI, Ryo Mibu, Katsumi SAKURAI, Tadashige IWAO
  • Publication number: 20160278066
    Abstract: A communication system includes a first communication apparatus that transmits a transmission notice of data and thereafter transmits the data, and a second communication apparatus that transmits a negative acknowledgement signal to the first communication apparatus when receiving the transmission notice and thereafter failing to detect data transmission corresponding to the transmission notice, wherein the first communication apparatus performs a retransmission process of the data when receiving the negative acknowledgement signal.
    Type: Application
    Filed: March 15, 2016
    Publication date: September 22, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Katsumi SAKURAI, Yuji TAKAHASHI, Takashi Higashinakagawa, Tadashige IWAO, Yasuyuki KAWAIDA
  • Publication number: 20160219647
    Abstract: A transmission apparatus includes a transmission unit that transmits, to a reception apparatus performing intermittent reception, a frame in which a subframe is repeated at intervals each being shorter than an interval for the intermittent reception, the subframe containing at least a preamble, a synchronization word, and data for the reception apparatus.
    Type: Application
    Filed: December 9, 2015
    Publication date: July 28, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Ryo Mibu, Katsumi Sakurai, Yuji Takahashi, Tadashige Iwao
  • Publication number: 20160218966
    Abstract: A method executed by a wireless communication device used in a wireless ad hoc network includes: designating a bit in a loop detection array added to a received frame in accordance with identification information of the wireless communication device; deciding that a route in which the received frame has been transmitted is not a loop when the bit designated in the loop detection array is not used; deciding that the route is a loop when the bit designated in the loop detection array is used; updating the bit designated in the loop detection array to a state of being used and transmitting the received frame toward a destination node when it is decided that the route is not a loop; and returning the received frame to an adjacent node that is a local transmission source of the received frame when it is decided that the route is a loop.
    Type: Application
    Filed: December 7, 2015
    Publication date: July 28, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Takashi Higashinakagawa, Katsumi SAKURAI, Yuji TAKAHASHI, Tadashige IWAO
  • Publication number: 20160219491
    Abstract: In a wireless communication system that includes a plurality of wireless terminals each of which has a first device type and transmits data to a destination, and a plurality of wireless relay apparatuses each of which has a second device type and relays the data that is received in wireless communication with each wireless terminal to the destination, each of the plurality of wireless terminals detects a wireless frame, receives data contained in the wireless frame when the detected wireless frame contains information that represents the first device type, and avoids receiving data contained in the wireless frame when the detected wireless frame contains information that represents the second device type.
    Type: Application
    Filed: December 9, 2015
    Publication date: July 28, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Katsumi SAKURAI, Yuji TAKAHASHI, Takashi Higashinakagawa, Yasuyuki KAWAIDA, Tadashige IWAO
  • Publication number: 20140074994
    Abstract: A gateway apparatus includes a sorting destination storing unit which stores information of a sorting destination that performs a process according to a destination, a sorting unit which outputs an input destination and transmission data to a sorting destination according to the destination searched from information stored in the sorting destination storing unit, a transmission destination storing unit which stores information of a transmission destination for each destination, an input/output unit which performs a transmission process and a reception process according to a corresponding protocol stack, and a protocol converting unit which assembles, when a destination and transmission data are input from the sorting unit, the destination and the transmission data as data that matches a format of a corresponding protocol stack, and instructs the input/output unit of a corresponding protocol stack to transmit the assembled data to a transmission destination according to the destination.
    Type: Application
    Filed: November 14, 2013
    Publication date: March 13, 2014
    Applicant: FUJITSU LIMITED
    Inventors: Takeo HONDA, Katsuyuki MATSUNAGA, Katsumi SAKURAI, Seiichi KAWASHIMA, Satoshi KASAI, Kazuya KAWASHIMA, Tetsu YAMAMOTO, Tadashige IWAO
  • Patent number: 6187763
    Abstract: The present invention provides a pharmaceutical composition for local administration in the form of an emulsion that contains active vitamin D3 and is suitable for application to areas with (the) hair, while also having satisfactory pharmacological activity, primary drug stability and physical stability. This lotion contains (a) a therapeutically effective amount of active vitamin D3, (b) an oil phase component containing a solid oil component comprising white Petrolatum and a higher alcohol and a liquid oil component comprising squalane, (c) an aqueous phase component containing ionic polysaccharide, and (d) nonionic surfactant; wherein, (1) the content of said ionic polysaccharide is 0.3-1.0 parts by weight of the entire preparation, (2) the content of said higher alcohol is 0.2-1.0 parts by weight of the entire preparation, and (3) the HLB of said nonionic surfactant is 10 or more.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: February 13, 2001
    Assignee: Teijin Limited
    Inventors: Seiji Mochizuki, Wataru Akasofu, Katsumi Sakurai, Kazuya Takanashi, Noriaki Okamura, Takao Fujii
  • Patent number: 4859888
    Abstract: A cross flow type cooling fan device installed in the internal part of electric appliances which need cooling such as audio-amplifiers, microcomputers, word processors, copying machine, etc. The cross flow type cooling fan device is characterized in that an impeller (107) with air blowing slits formed around a hollow area in the center of a cylindrical body is rotatably supported by supporting frames (109, 110) at the ends thereof through supporting shafts (111, 112), a field magnet (121) is mounted either on a rotary side formed by the impeller (107) or the supporting shafts (111, 112) or on a stationary side formed by the supporting frames (109, 110), and an armature winding (124) is mounted confronting the aforesaid magnet for the motor, so that a rotary driving section of the impeller is constructed resulting in a cooling fan device of considerably reduced size.
    Type: Grant
    Filed: May 13, 1987
    Date of Patent: August 22, 1989
    Assignee: Hosiden Electronics Co., Ltd.
    Inventors: Yoshiaki Ohbayashi, Kunio Hashimoto, Katsumi Sakurai, Hiroyuki Noma
  • Patent number: 4477708
    Abstract: Both thickened end portions of predetermined lengths of an upset steel pipe are preheated simultaneously, in advance of heat treatment of the pipe, in an apparatus provided with means for raising or lowering the stationarily supported upset steel pipe and with a pair of induction heaters for simultaneously heating both end portions of the upset steel pipe in the raised position of the pipe, said pair of induction heaters being set in advance to a relative spacing corresponding to the length of said steel pipe, and reciprocated with strokes corresponding to the lengths of the thickened end portions. The support means for raising and lowering the pipe comprise a plurality of units which may be raised and lowered separately and selectively.
    Type: Grant
    Filed: July 16, 1982
    Date of Patent: October 16, 1984
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Shigeru Sano, Katsumi Sakurai, Tatsuo Ono, Kanji Tsuruoka, Masaru Watanabe
  • Patent number: 4444376
    Abstract: A multi-pipe quenching apparatus for simultaneously quenching a plurality of steel pipes at a high speed. The apparatus comprises (a) a steel pipe holding table for holding a plurality of steel pipes arranged in parallel which table is provided with a plurality of sets each including a plurality of clamp means for clamping a steel pipe at a plurality of points in the lengthwise direction thereof, and cooling water supply means for supplying water into said pipe through a nozzle pressed thereagainst, and (b) a quenching tank capable of containing water up to a predetermined level as occasion demands; whereby the holding table is vertically moved into and out of the quenching tank and the supply of water into the steel pipes is controlled by the cooling water supply means thereby quenching the steel pipes.
    Type: Grant
    Filed: September 6, 1983
    Date of Patent: April 24, 1984
    Assignee: Nippon Kokan Kabushiki Kaisha
    Inventors: Harumi Noguchi, Kazuo Atago, Katsumi Sakurai, Tatsuo Ono