Patents by Inventor Hirokazu Tsuruta

Hirokazu Tsuruta 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: 20190200867
    Abstract: The technology is directed to an optical fiber scanner configured to be used in an observation device. The optical fiber scanner comprises an optical fiber guiding light therethrough. A vibration transmitting member is configured to transmit vibrations to the optical fiber. The vibration transmitting member includes a through hole defined therein through which the optical fiber extends. At least one piezoelectric element is disposed on an outer circumferential surface of the vibration transmitting member and vibrating a distal end portion of the optical fiber via the vibration transmitting member. A fixing member is disposed on a proximal end side of the vibration transmitting member. A tubular wire holding member includes a plurality of wires integrally attached for supplying a voltage to the piezoelectric element. The tubular wire holding member has a contact portion securing the plurality of wires to an outer peripheral surface of the piezoelectric element in contact therewith.
    Type: Application
    Filed: March 7, 2019
    Publication date: July 4, 2019
    Applicant: Olympus Corporation
    Inventors: Hirokazu Yokota, Yasuaki Kasai, Hiroshi Tsuruta, Takashi Yasumi
  • Patent number: 10330916
    Abstract: Provided is an optical-fiber scanner including: an optical fiber; a body fitted on a basal-end side of the optical fiber; piezoelectric elements secured to the body and causing the optical fiber to vibrate; and a securing portion to which the body is fitted at a position that is farther on a basal-end side away from the piezoelectric elements, wherein the body has a columnar portion that is formed of an elastic material to which the piezoelectric elements are attached and that has a through-hole into which the optical fiber can be inserted, and a distal-end portion that is disposed at a distal end of the columnar portion, that supports the optical fiber in a fitted state, and that has a rotator shape in which a cross-sectional area thereof in a radial direction gradually decreases toward a distal end of the optical fiber.
    Type: Grant
    Filed: May 8, 2017
    Date of Patent: June 25, 2019
    Assignee: OLYMPUS CORPORATION
    Inventors: Hiroshi Tsuruta, Yasuaki Kasai, Hirokazu Yokota
  • Patent number: 9092619
    Abstract: A data processing apparatus is provided, which detects falsification of software to data and rewriting of the data. The data processing apparatus according to an embodiment of the present invention comprises a security unit which has an encryption circuit for decrypting an encrypted signal including secrecy data. The security unit includes a compression circuit which compresses an access signal used in accessing the security unit and outputs the compression result, and a comparison circuit which compares the compression result outputted from the compression circuit with a previously-calculated expectation value of the compression result of the access signal.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: July 28, 2015
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Hirokazu Tsuruta, Atsuo Yamaguchi, Shigenori Miyauchi
  • Publication number: 20120079286
    Abstract: A data processing apparatus is provided, which detects falsification of software to data and rewriting of the data. The data processing apparatus according to an embodiment of the present invention comprises a security unit which has an encryption circuit for decrypting an encrypted signal including secrecy data. The security unit includes a compression circuit which compresses an access signal used in accessing the security unit and outputs the compression result, and a comparison circuit which compares the compression result outputted from the compression circuit with a previously-calculated expectation value of the compression result of the access signal.
    Type: Application
    Filed: December 2, 2011
    Publication date: March 29, 2012
    Applicant: Renesas Electronics Corporation
    Inventors: Hirokazu TSURUTA, Atsuo Yamaguchi, Shigenori Miyauchi
  • Patent number: 8140858
    Abstract: A data processing apparatus is provided, which detects falsification of software to data and rewriting of the data. The data processing apparatus according to an embodiment of the present invention comprises a security unit which has an encryption circuit for decrypting an encrypted signal including secrecy data. The security unit includes a compression circuit which compresses an access signal used in accessing the security unit and outputs the compression result, and a comparison circuit which compares the compression result outputted from the compression circuit with a previously-calculated expectation value of the compression result of the access signal.
    Type: Grant
    Filed: March 10, 2009
    Date of Patent: March 20, 2012
    Assignee: Renesas Electronics Corporation
    Inventors: Hirokazu Tsuruta, Atsuo Yamaguchi, Shigenori Miyauchi
  • Publication number: 20090259856
    Abstract: A data processing apparatus is provided, which detects falsification of software to data and rewriting of the data. The data processing apparatus according to an embodiment of the present invention comprises a security unit which has an encryption circuit for decrypting an encrypted signal including secrecy data. The security unit includes a compression circuit which compresses an access signal used in accessing the security unit and outputs the compression result, and a comparison circuit which compares the compression result outputted from the compression circuit with a previously-calculated expectation value of the compression result of the access signal.
    Type: Application
    Filed: March 10, 2009
    Publication date: October 15, 2009
    Inventors: Hirokazu Tsuruta, Atsuo Yamaguchi, Shigenori Miyauchi
  • Publication number: 20070192599
    Abstract: After a selection key bundle is determined by a selection key bundle determining process, the following first authentication key authenticating process is executed. An authentication processing part selects a selection encryption key from selection key bundle following a predetermined association based on a received random-number data. On the other hand, another authentication processing part selects an encryption key from the selection key bundle as a selection encryption key, following the association based on the received random-number data, encrypts the random-number data using the selection encryption key so as to acquire encrypted random-number data and transmits to the former authentication processing part.
    Type: Application
    Filed: January 25, 2006
    Publication date: August 16, 2007
    Inventors: Junji Kato, Hirokazu Tsuruta