Patents by Inventor Takashi Tachikawa

Takashi Tachikawa 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: 20160001268
    Abstract: Various metal oxide mesocrystals can be synthesized in a simple manner by a method for producing a metal oxide mesocrystal, the method comprising the step of annealing an aqueous precursor solution comprising one or more metal oxide precursors, an ammonium salt, a surfactant, and water at 300 to 600° C. Composite mesocrystals consisting of a plurality of metal oxides or an alloy oxide can also be provided.
    Type: Application
    Filed: December 2, 2013
    Publication date: January 7, 2016
    Applicant: OSAKA UNIVERSITY
    Inventors: Tetsuro Majima, Takashi Tachikawa, Zhenfeng Bian
  • Patent number: 8803481
    Abstract: A battery pack for an electrically powered tool includes: one or plural secondary batteries connected in series and/or in parallel; a current detection resistor in a current path through which a charge/discharge current flows into each secondary battery; an N-channel charge control FET and an N-channel discharge control FET in the current path so as to control the charge/discharge current; and a controller detecting the charge/discharge current flowing in the current detection resistor and controlling the charge and discharge control FETs based on the detection result. A threshold value indicating an overcurrent detection current with respect to the charge/discharge current is set in advance, and the controller compares the charge/discharge current detected by the current detection resistor with the threshold value, and when the detected charge/discharge current is the threshold value or more, determines that an overcurrent state is detected and turns off the charge and discharge control FETs.
    Type: Grant
    Filed: January 6, 2010
    Date of Patent: August 12, 2014
    Assignee: Sony Corporation
    Inventors: Takashi Tachikawa, Masaki Hogari, Kiyohiko Watanabe
  • Patent number: 8397003
    Abstract: There are provided a CPU connection circuit and a method by two CPUs by alternately conducting a changeover between two buffers disposed there between to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controller which monitors whether or not an amount of data stored by a CCPU 1 in either one of buffers 301 and 302 reaches a predetermined threshold value; when the amount of data stored by the CCPU 1 in the buffer 301, 302 reaches the threshold value, the memory controller requests an ACPU 2 to acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPU 1 sends to the buffer 301, 302.
    Type: Grant
    Filed: July 2, 2012
    Date of Patent: March 12, 2013
    Assignee: NEC Corporation
    Inventors: Takao Nakagawa, Takashi Tachikawa, Naoyuki Nakamura, Tadashi Tsukamoto, Toshikatsu Hosoi, Hiroshi Kurakane
  • Patent number: 8355326
    Abstract: There are provided a CPU connection circuit and a method wherein the CPU connection circuit is a circuit to be employed by two CPUs by alternately conducting a changeover between two buffers disposed therebetween to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controller 303 which monitors whether or not an amount of data stored by a CCPU 1 in either one of buffers 301 and 302 reaches a predetermined threshold value; when the amount of data stored by the CCPU 1 in the buffer 301, 302 reaches the threshold value, the memory controller 303 requests an ACPU 2 to acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPU 1 sends to the buffer 301, 302.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: January 15, 2013
    Assignee: NEC Corporation
    Inventors: Takao Nakagawa, Takashi Tachikawa, Naoyuki Nakamura, Tadashi Tsukamoto, Toshikatsu Hosoi, Hiroshi Kurakane
  • Publication number: 20120331190
    Abstract: There are provided a CPU connection circuit and a method by two CPUs by alternately conducting a changeover between two buffers disposed there between to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controller which monitors whether or not an amount of data stored by a CCPU 1 in either one of buffers 301 and 302 reaches a predetermined threshold value; when the amount of data stored by the CCPU 1 in the buffer 301, 302 reaches the threshold value, the memory controller requests an ACPU 2 to acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPU 1 sends to the buffer 301, 302.
    Type: Application
    Filed: July 2, 2012
    Publication date: December 27, 2012
    Applicant: NEC CORPORATION
    Inventors: Takao NAKAGAWA, Takashi TACHIKAWA, Naoyuki NAKAMURA, Tadashi TSUKAMOTO, Toshikatsu HOSOI, Hiroshi KURAKANE
  • Publication number: 20110249560
    Abstract: There are provided a CPU connection circuit and a method wherein the CPU connection circuit is a circuit to be employed by two CPUs by alternately conducting a changeover between two buffers disposed therebetween to prevent an event that data processing cannot be fully executed by the CPU on the receiving side. There is included a memory controller 303 which monitors whether or not an amount of data stored by a CCPU 1 in either one of buffers 301 and 302 reaches a predetermined threshold value; when the amount of data stored by the CCPU 1 in the buffer 301, 302 reaches the threshold value, the memory controller 303 requests an ACPU 2 to acquire the data stored in the buffer and changes the storage destination of data from the CCPU to the other one of the buffers; the threshold value is a value more than a unit quantity of data which the CCPU 1 sends to the buffer 301, 302.
    Type: Application
    Filed: July 25, 2007
    Publication date: October 13, 2011
    Inventors: Takao Nakagawa, Takashi Tachikawa, Naoyuki Nakamura, Tadashi Tsukamoto, Toshikatsu Hosoi, Hiroshi Kurakane
  • Publication number: 20100176764
    Abstract: A battery pack for an electrically powered tool includes: one or plural secondary batteries connected in series and/or in parallel; a current detection resistor in a current path through which a charge/discharge current flows into each secondary battery; an N-channel charge control FET and an N-channel discharge control FET in the current path so as to control the charge/discharge current; and a controller detecting the charge/discharge current flowing in the current detection resistor and controlling the charge and discharge control FETs based on the detection result. A threshold value indicating an overcurrent detection current with respect to the charge/discharge current is set in advance, and the controller compares the charge/discharge current detected by the current detection resistor with the threshold value, and when the detected charge/discharge current is the threshold value or more, determines that an overcurrent state is detected and turns off the charge and discharge control FETs.
    Type: Application
    Filed: January 6, 2010
    Publication date: July 15, 2010
    Applicant: Sony Corporation
    Inventors: Takashi Tachikawa, Masaki Hogari, Kiyohiko Watanabe
  • Patent number: 7518595
    Abstract: A control unit 203 controls a position of a pointer to be displayed on a display 208A in response to an operation of a pointing device (PD) 11 by the user. In this case, the control unit 203 detects actual operation directions 50 and 50? of the PD 11 by means of a sensing module 13. Next, the control unit 203 determines whether or not the actual operation directions 50 and 50? are included in an adjustment region 70, which is preset with a movable range of the PD 11 as an object to be adjusted. Then, when it is determined that the actual operation directions are included in the adjustment region 70, the control unit 203 adjusts information indicating the actual operation directions to information indicating a direction 60 so predetermined as to correspond to the adjustment region in such a way that a moving direction of the pointer displayed on the display 208A in response to the actual operation directions is changed to the predetermined direction.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: April 14, 2009
    Assignee: NEC Corporation
    Inventor: Takashi Tachikawa
  • Patent number: 7437600
    Abstract: Reliability of stored data in a semiconductor storage device such as a flash memory is enhanced. There are provided (n+1) physical storage regions each having m data storage areas and for which data writing, data reading, data erasure, and the like are collectively performed. A sequence of data input from a supervisory host as write data are rearranged, and that sequence of data is split across the n physical storage regions, for storage. Error correction data for the sequence of data 1 to data n split across the respective physical storage regions is stored in another (n+1)th physical storage region as data p1. Error correction data p2 for data (n+1) to data 2n, and error correction data pm for data ((m?1)n+1) to data mn are stored in the same manner.
    Type: Grant
    Filed: February 18, 2005
    Date of Patent: October 14, 2008
    Assignee: NEC Corporation
    Inventor: Takashi Tachikawa
  • Patent number: 7040176
    Abstract: A member of an earthquake-proof reinforcement structure is selected with reference to the allowable stress intensity ratio of the member, a ductility factor ratio allowable as a deformation magnification by earthquake-proof reinforcement of the selected member is set, an increase in load in a plasticity range, which acts on the selected member, is calculated on the basis of the set ductility factor ratio, and a corresponding allowable stress intensity ratio is obtained. When the obtained allowable stress intensity ratio is defined as a maximum value of 1.0, the corresponding increase in load in the plasticity range is specified as an ultimate load at which the selected member collapses.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: May 9, 2006
    Assignees: Nihonkai Lng Co., Ltd, Mitsubishi Heavy Industries, Ltd., Jonquil Consulting Inc.
    Inventors: Hajime Anzai, Takashi Tachikawa, Keijiro Yoshida, Hiroshi Sudo, Tomomichi Nakamura, Shigeru Ochiai
  • Patent number: 7039427
    Abstract: A private information supplying system is established in a mobile telephone network, and the mobile stations are assumed to be at the positions of base stations presently communicating; an information service center produces a piece of relative position between users on the basis of the current positions, and transmits the piece of relative position when the user permits the other user to acquire it; the private information supplying system does not require any assistance of the GPS so that the system is economical and does not disturb the privacy.
    Type: Grant
    Filed: May 28, 2002
    Date of Patent: May 2, 2006
    Assignee: NEC Corporation
    Inventor: Takashi Tachikawa
  • Publication number: 20050185476
    Abstract: Reliability of stored data in a semiconductor storage device such as a flash memory is enhanced. There are provided (n+1) physical storage regions each having m data storage areas and for which data writing, data reading, data erasure, and the like are collectively performed. A sequence of data input from a supervisory host as write data are rearranged, and that sequence of data is split across the n physical storage regions, for storage. Error correction data for the sequence of data 1 to data n split across the respective physical storage regions is stored in another (n+1)th physical storage region as data p1. Error correction data p2 for data (n+1) to data 2n, and error correction data pm for data ((m?1)n+1) to data mn are stored in the same manner.
    Type: Application
    Filed: February 18, 2005
    Publication date: August 25, 2005
    Inventor: Takashi Tachikawa
  • Publication number: 20040263472
    Abstract: A control unit 203 controls a position of a pointer to be displayed on a display 208A in response to an operation of a pointing device (PD) 11 by the user. In this case, the control unit 203 detects actual operation directions 50 and 50′ of the PD 11 by means of a sensing module 13. Next, the control unit 203 determines whether or not the actual operation directions 50 and 50′ are included in an adjustment region 70, which is preset with a movable range of the PD 11 as an object to be adjusted. Then, when it is determinedthat the actual operation directions are included in the adjustment region 70, the control unit 203 adjusts information indicating the actual operation directions to information indicating a direction 60 so predetermined as to correspond to the adjustment region in such a way that a moving direction of the pointer displayed on the display 208A in response to the actual operation directions is changed to the predetermined direction.
    Type: Application
    Filed: June 23, 2004
    Publication date: December 30, 2004
    Applicant: NEC CORPORATION
    Inventor: Takashi Tachikawa
  • Patent number: 6636951
    Abstract: A load estimator supplies, to a controller, a load condition signal corresponding to the current load condition and the estimated load condition of the system. An operational setting storage unit stores an operational setting requirement of the entire system. When the controller determines that the operational requirement meets the operational setting requirement, and the load condition signal meets a predetermined requirement, it reads out, from a relocation program storage unit, an optimum relocation program in association with location information stored in a data location information storage unit, and controls a data relocation unit in accordance with the read relocation program. During a process for relocating data, the controller monitors a predetermined requirement of the suspension (execution of writing, etc., data to a data storage unit). When the requirement of the suspension is fulfilled, the controller terminates the data relocation process processed by the data relocation unit.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: October 21, 2003
    Assignee: TDK Corporation
    Inventor: Takashi Tachikawa
  • Publication number: 20020183052
    Abstract: A private information supplying system is established in a mobile telephone network, and the mobile stations are assumed to be at the positions of base stations presently communicating; an information service center produces a piece of relative position between users on the basis of the current positions, and transmits the piece of relative position when the user permits the other user to acquire it; the private information supplying system does not require any assistance of the GPS so that the system is economical and does not disturb the privacy.
    Type: Application
    Filed: May 28, 2002
    Publication date: December 5, 2002
    Applicant: NEC CORPORATION
    Inventor: Takashi Tachikawa
  • Publication number: 20020095275
    Abstract: A member of an earthquake-proof reinforcement structure is selected with reference to the allowable stress intensity ratio of the member, a ductility factor ratio allowable as a deformation magnification by earthquake-proof reinforcement of the selected member is set, an increase in load in a plasticity range, which acts on the selected member, is calculated on the basis of the set ductility factor ratio, and a corresponding allowable stress intensity ratio is obtained. When the obtained allowable stress intensity ratio is defined as a maximum value of 1.0, the corresponding increase in load in the plasticity range is specified as an ultimate load at which the selected member collapses.
    Type: Application
    Filed: December 6, 2001
    Publication date: July 18, 2002
    Inventors: Hajime Anzai, Takashi Tachikawa, Keijiro Yoshida, Hiroshi Sudo, Tomomichi Nakamura, Shigeru Ochiai
  • Patent number: 6191908
    Abstract: A magnetic disk unit lowers a possibility to cause data reproduction errors by setting a gain of a variable gain amplifier (VGA) at a predetermined fixed level for a predetermined time when an output from the VGA which amplifies an input signal is changed to a value smaller than an optimum value upon occurrence of a thermal asperity and then restoring a variable gain condition so that an output amplitude automatically has a certain preset value.
    Type: Grant
    Filed: June 29, 1998
    Date of Patent: February 20, 2001
    Assignee: NEC Corporation
    Inventor: Takashi Tachikawa