Patents by Inventor Shigeru Nishikawa

Shigeru Nishikawa 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: 20180109989
    Abstract: A voltage compensation circuit in a wireless communication device that performs wireless communication under a time division duplex (TDD) scheme includes a first path on which a diode is placed, a second path on which another diode is placed, and a timing controller. The first path is a path that supplies, to a transmitter-receiver, power output from a power supply and having a first voltage. The second path is a path that supplies power having a second voltage obtained by boosting the first voltage of the power output from the power supply. The timing controller switches between the first path and the second path based on information on timing of switch from signal reception to signal transmission.
    Type: Application
    Filed: August 28, 2017
    Publication date: April 19, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Hiromi MIYAMOTO, Akihiro Yamamoto, Shigeru NISHIKAWA, JUNJI TAMAKI
  • Patent number: 8571207
    Abstract: A hash value calculation apparatus, which calculates a hash value of a message, includes: an input unit adapted to input an extended block obtained from a message to be processed; a hash value calculation unit adapted to execute a hash value calculation of the input block and to output a hash intermediate value; a plurality of intermediate value storage units adapted to store the hash intermediate value output by the hash value calculation unit for the message to be processed; an output unit adapted to output a hash intermediate value associated with all blocks of the message to be processed as a hash value of the message; and a hash value calculation control unit adapted to control hash value calculations for a plurality of messages by switching the intermediate value storage units used to store the hash intermediate value output from the hash value calculation unit.
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: October 29, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Nishikawa, Akemi Kikuchi, Akihiko Yushiya, Shiori Wakino
  • Patent number: 8560832
    Abstract: To efficiently perform encryption/decryption and message authentication processing for a plurality of messages in parallel, an information processing apparatus includes a plurality of encryption/decryption and message authentication units which can perform encryption/decryption processing and message authentication processing by switching between them in a predetermined block unit, and are configured to be operable in parallel, and a data transfer control unit which distributes processing target data associated with an encryption/decryption and message authentication processing request to the plurality of encryption/decryption and message authentication units.
    Type: Grant
    Filed: November 20, 2009
    Date of Patent: October 15, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Nishikawa, Akihiko Yushiya
  • Patent number: 8045198
    Abstract: A printer includes a file input section that receives an input PDF file that holds change history; a change history extraction section that extracts the change history from the input PDF file; and a print processing section that prints the extracted change history.
    Type: Grant
    Filed: November 29, 2006
    Date of Patent: October 25, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Shigeru Nishikawa
  • Publication number: 20100138648
    Abstract: To efficiently perform encryption/decryption and message authentication processing for a plurality of messages in parallel, an information processing apparatus includes a plurality of encryption/decryption and message authentication units which can perform encryption/decryption processing and message authentication processing by switching between them in a predetermined block unit, and are configured to be operable in parallel, and a data transfer control unit which distributes processing target data associated with an encryption/decryption and message authentication processing request to the plurality of encryption/decryption and message authentication units.
    Type: Application
    Filed: November 20, 2009
    Publication date: June 3, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigeru Nishikawa, Akihiko Yushiya
  • Publication number: 20100135484
    Abstract: A hash value calculation apparatus, which calculates a hash value of a message, includes: an input unit adapted to input an extended block obtained from a message to be processed; a hash value calculation unit adapted to execute a hash value calculation of the input block and to output a hash intermediate value; a plurality of intermediate value storage units adapted to store the hash intermediate value output by the hash value calculation unit for the message to be processed; an output unit adapted to output a hash intermediate value associated with all blocks of the message to be processed as a hash value of the message; and a hash value calculation control unit adapted to control hash value calculations for a plurality of messages by switching the intermediate value storage units used to store the hash intermediate value output from the hash value calculation unit.
    Type: Application
    Filed: November 25, 2009
    Publication date: June 3, 2010
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Shigeru Nishikawa, Akemi Kikuchi, Akihiko Yushiya, Shiori Wakino
  • Publication number: 20090304658
    Abstract: The present application aims at providing a treatment method effective for various cancers, immune deficiency diseases and infections, and a method of proliferating/activating cells associated therewith, which can be performed at such low costs that the methods can be applicable to nonhuman animals. A method of proliferating/activating cells of the present application comprises steps of, during the cell culture, supplementing a plant lectin (such as concanavalin A) and a growth factor having interleukin-2-like activity to the culture medium. Accordingly, the present method can proliferate/activate, on a preferential basis, a?-type T cells associated with cell-mediated immunity for cancers, immunodeficiency diseases and infectious diseases.
    Type: Application
    Filed: August 1, 2007
    Publication date: December 10, 2009
    Inventors: Shinobu Watarai, Shigeru Nishikawa
  • Patent number: 7433528
    Abstract: In an image processing apparatus that performs image processing including a plurality of steps that do not need to be executed simultaneously, processing circuits used in steps that do not need to be executed simultaneously are reconfigured in time division using dynamically reconfigurable circuits, implementing a plurality of circuits without increasing the number of gates as well as achieving fast processing speed because processing is by hardware.
    Type: Grant
    Filed: July 5, 2005
    Date of Patent: October 7, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shigeru Nishikawa
  • Publication number: 20070236717
    Abstract: A printer includes a file input section that receives an input PDF file that holds change history; a change history extraction section that extracts the change history from the input PDF file; and a print processing section that prints the extracted change history.
    Type: Application
    Filed: November 29, 2006
    Publication date: October 11, 2007
    Applicant: Fuji Xerox Co., Ltd.
    Inventor: Shigeru Nishikawa
  • Publication number: 20070098153
    Abstract: A cryptographic processing apparatus includes a holding unit adapted to hold data of a processing target, an intermediate data holding unit adapted to hold information generated during the cryptographic processing as intermediate data, a circuit reconfiguration processor which reconfigures a first circuit which generates round key information on the basis of the intermediate data and/or the key information, in accordance with input of first control information, and reconfigures a second circuit which performs operation processing on the basis of the data and/or the intermediate data and the round key information, in accordance with input of second control information, and a control unit adapted to output the first control information to the circuit reconfiguration processor at a first timing, and output the second control information to the circuit reconfiguration processor at a second timing.
    Type: Application
    Filed: August 28, 2006
    Publication date: May 3, 2007
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Shigeru NISHIKAWA
  • Publication number: 20060008163
    Abstract: In an image processing apparatus that performs image processing including a plurality of steps that do not need to be executed simultaneously, processing circuits used in steps that do not need to be executed simultaneously are reconfigured in time division using dynamically reconfigurable circuits, implementing a plurality of circuits without increasing the number of gates as well as achieving fast processing speed because processing is by hardware.
    Type: Application
    Filed: July 5, 2005
    Publication date: January 12, 2006
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Shigeru Nishikawa
  • Patent number: 5857017
    Abstract: A call waiting notifying apparatus including a discriminating circuit to discriminate to see if a call reception has been generated from a digital line to an analog terminal in communication or not; and a transmitting circuit to transmit a predetermined tone to the analog terminal if the generation of the call waiting is determined by the discriminating circuit. The discriminating circuit discriminates the generation of the call waiting on the basis of a command received through a control channel of the digital line.
    Type: Grant
    Filed: October 24, 1997
    Date of Patent: January 5, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hirokazu Ohi, Shigeru Nishikawa, Michihiro Izumi
  • Patent number: 5757898
    Abstract: Devices, such as a mouse and a keyboard, a monitor of a PC, a microphone and a speaker provided on the extension board, and a sound input/output device of the sound input/output unit which is connected to the extension board are utilized as a display unit, an operation unit, and a sound input/output unit of the key telephone, respectively, by interchanging control information between a central processing unit of a PC main device and a control unit of an extension board which includes an exchange circuit, an information processing circuit, an I/F circuit, and a telephone circuit for an extension line. Accordingly, it is possible to provide an information processing and communication apparatus, capable of controlling at least one external line and a plurality of extension lines, with superior operability, which has combined functions of a PC and a key telephone system.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: May 26, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventor: Shigeru Nishikawa
  • Patent number: 5581612
    Abstract: In a private branch exchange system which includes a private branch exchange accommodating a plurality of line wires and extensions for switching lines between the two, and telephones, which are usable in the event of a power failure, connected to the extensions, the line wires and the power-failure telephones are connected when power feed to the private branch exchange is no longer performed owing to a power failure or the like. When power feed is restored, the call status of the power-failure telephone is monitored and, if it is found that a call is in progress.
    Type: Grant
    Filed: September 30, 1993
    Date of Patent: December 3, 1996
    Assignee: Canon Kaubshiki Kaisha
    Inventor: Shigeru Nishikawa
  • Patent number: 5095504
    Abstract: In a telephone system for performing channel control among telephones connected to a plurality of telephone lines, a call during a conversation between first and second telephones is placed on hold by a hold request from, say, the second telephone, and the call is capable of being transferred to a third telephone. It is also possible for the holding first telephone to instruct that the holding state be cancelled during the call transfer processing. When such a hold cancellation input from the first telephone is detected, the second telephone that requested the hold is so notified by an alarm. If the first telephone is subsequently hung up, the holding call is released and the connecting line of the first telephone is opened. When the second telephone cancels the holding state, the holding call is released and communication between the first and second telephones is restored.
    Type: Grant
    Filed: September 28, 1988
    Date of Patent: March 10, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shigeru Nishikawa, Shugoro Ueno, Michihiro Izumi
  • Patent number: 5068219
    Abstract: A superconducting structural body comprising an oxide based superconducting ceramics powder having a perovskite structure and a metal sheath surrounding the oxide based superconducting ceramics powder, the metal sheath including an Ag portion and a non-Ag metal portion, the Ag portion existing from the inner to outer surfaces of the metal sheath, a superconducting ceramics powder portion existing in the structural body, the non-Ag metal protion used as a structural material of the metal sheath of an outermost layer of the structural body, the superconducting ceramics powder portion and the non-Ag metal portion being disposed so as to be indirectly contact each other through the Ag material, and the superconducting structural body having a compressed oriented layer in which the C-axis of the crystal in the superconducting ceramics powder is oriented in the direction perpendicular to the longitudinal direction of the superconducting structural body, and in which a thickness thereof is not smaller than 5 .mu.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: November 26, 1991
    Assignee: Mitsubishi Materials Corporation
    Inventors: Sadaaki Hagino, Motokazu Suzuki, Hideyuki Kondo, Shigeru Nishikawa, Kenichi Hayashi
  • Patent number: 4983576
    Abstract: A superconducting structural body comprisinga superconducting ceramics anda metal sheath surrounding the superconducting ceramics,the metal sheath includingan Ag portion anda non-Ag metal portion, the Ag portion existing from inner to outer faces of the metal sheath, and the superconducting ceramics portion existing in the structural body and the non-Ag metal portion used as a structural material for the metal sheath as the outermost indirectly contacting each other through the Ag material.
    Type: Grant
    Filed: August 24, 1989
    Date of Patent: January 8, 1991
    Assignee: Mitsubishi Kinzoku Kabushiki Kaisha
    Inventors: Sadaaki Hagino, Motokazu Suzuki, Shigeru Nishikawa, Kenichi Hayashi
  • Patent number: 4870680
    Abstract: A communication apparatus such as a telephone set has a hold circuit for putting a telephone call from a communication partner on hold, a release circuit for releasing the telephone call from the on-hold condition, a circuit for informing the communication partner when the telephone call is released and a detect circuit for detecting when the communication partner whose telephone call is on hold breaks the line, e.g. by hanging up. The communication partner is informed of the release of the on-hold condition in accordance with such release and the detection of line break by the detect circuit.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: September 26, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kuniaki Ohtsuka, Shigeru Nishikawa
  • Patent number: 4417401
    Abstract: A garment measuring device comprises a standard body resembling a human body and a plurality of contact pieces of curved planes provided with a sensor for detecting the contact pressure exerted by the garment and protrusibly disposed at necessary positions of the standard body. With this device, measurement of a given garment is effected by putting the garment on the standard body, allowing the contact pieces to protrude from the standard body until they reach the garment, and calculating the sizes of the garment on the basis of the amounts of protrusion of the contact pieces.
    Type: Grant
    Filed: March 30, 1982
    Date of Patent: November 29, 1983
    Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & Industry
    Inventors: Noboru Aisaka, Shigeru Nishikawa, Atsuo Shibuya, Yasuo Bessho, Hitoshi Akami, Shigeo Ogawa
  • Patent number: 4017894
    Abstract: In a method of preparing color separation printing patterns from a multi-color original design, the design is irradiated by light and multi-color light components reflected from minute picture elements constituting the design are detected. The detected light components are converted to picture element data representative of the optical energy level of the reflected light corresponding to each picture element. The picture element data are stored and filtered to form quantized picture element data indicative of several series of reflected light components respectively falling within different preselected ranges of color. This is done by comparing successive picture element data to detect significant differences in energy level indicative of color changes. The reason for each substantial difference in output level is determined, e.g., pattern defect or imperfection, and the filtered picture element data are stored along with change codes indicative of the reason for the difference.
    Type: Grant
    Filed: September 26, 1974
    Date of Patent: April 12, 1977
    Assignees: Agency of Industrial Science & Technology, Daido-Maruta Finishing Co., Ltd.
    Inventors: Hitoshi Akami, Shigeru Nishikawa, Toshio Ikeda, Akira Tsukokura