Patents by Inventor Takao Sasakura

Takao Sasakura 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: 20200157660
    Abstract: An alloy for biomedical use includes Zr as a main component, Nb the content of which is not less than 0.1% by weight and not greater than 25% by weight, Mo the content of which is not less than 0.1% by weight and not greater than 25% by weight, and Ta the content of which is not less than 0.1% by weight and not greater than 25% by weight. A tensile strength of the alloy is not less than 1000 MPa. A total content of Nb, Mo, and Ta in the alloy is not less than 2% by weight and not greater than 50% by weight. Mass susceptibility of the alloy is not greater than 1.50×10?6 cm3/g. A Young's modulus of the alloy is not greater than 100 GPa. Also disclosed is a medical product including the alloy and a method for producing the alloy.
    Type: Application
    Filed: July 24, 2018
    Publication date: May 21, 2020
    Applicants: TOKUSEN KOGYO CO., LTD, NATIONAL UNIVERSITY CORPORATION TOKYO MEDICAL AND DENTAL UNIVERSITY
    Inventors: Takao HANAWA, Yusuke TSUTSUMI, Mitsutaka SASAKURA
  • Publication number: 20040046910
    Abstract: A display apparatus is constituted by a planar display device and a planar illumination device therefor. A lowering in light quantity at a periphery of the planar illumination device is prevented by inserting a reflection member, such as a reflection frame, having an inside reflection surface along the periphery of the illumination device, or a combination of a scattering means and a transparent sheet member between the display device and the illumination device. A plurality of the display apparatus may be combined to allow an associate movement thereof so as to constitute a composite display apparatus, such as a head-mount display.
    Type: Application
    Filed: June 20, 2003
    Publication date: March 11, 2004
    Applicant: Canon Kabushiki Kaisha
    Inventors: Takao Sasakura, Noritaka Mochizuki, Hiroaki Hoshi
  • Patent number: 6633350
    Abstract: A display apparatus is constituted by a planar display device and a planar illumination device therefor. A lowering in light quantity at a periphery of the planar illumination device is prevented by inserting a reflection member, such as a reflection frame, having an inside reflection surface along the periphery of the illumination device, or a combination of a scattering means and a transparent sheet member between the display device and the illumination device. A plurality of the display apparatus may be combined to allow an associate movement thereof so as to constitute a composite display apparatus, such as a head-mount display.
    Type: Grant
    Filed: June 9, 1999
    Date of Patent: October 14, 2003
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Sasakura, Noritaka Mochizuki, Hiroaki Hoshi
  • Patent number: 6449426
    Abstract: In an image sensing and recording apparatus capable of recording image data on plural types of removable recording media, a recording speed of a recording medium for recording image data is recognized, then image sensing modes, including-a single image sensing mode and a sequential image sensing mode, which are set in advance are classified into available image sensing mode and unavailable image sensing mode on the basis of the recognized recording speed. Further, image sensing parameters, including numbers of pixels per frame and frame rates for the sequential image sensing mode, which are set in advance are also classified into available image sensing mode and unavailable image sensing mode on the basis of the recognized recording speed of the recording medium.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: September 10, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Akira Suga, Tomotaka Muramoto, Takao Sasakura
  • Patent number: 6346999
    Abstract: An image pickup apparatus is provided which can obtain a high image quality by using a camera with a conventional field read type DSP. The image pickup apparatus has an image pickup element having a plurality of color filters disposed in a predetermined layout at respective pixel positions, a calculating and processing unit for performing calculation and processing by using two sets of adjacent pixel data in the vertical direction, at each line of image data generated by the image pickup element, and a luminance signal generating unit for generating a luminance signal by using an output of the calculating and processing unit.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: February 12, 2002
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yoshiro Udagawa, Masao Suzuki, Nobuhiro Takeda, Takao Sasakura, Ryoji Kubo, Hideaki Yamaki, Shingo Tatsumi, Masato Ikeda
  • Publication number: 20020005921
    Abstract: A display apparatus is constituted by a planar display device and a planar illumination device therefor. A lowering in light quantity at a periphery of the planar illumination device is prevented by inserting a reflection member, such as a reflection frame, having an inside reflection surface along the periphery of the illumination device, or a combination of a scattering means and a transparent sheet member between the display device and the illumination device. A plurality of the display apparatus may be combined to allow an associate movement thereof so as to constitute a composite display apparatus, such as a head-mount display.
    Type: Application
    Filed: June 9, 1999
    Publication date: January 17, 2002
    Inventors: TAKAO SASAKURA, NORITAKA MOCHIZUKI, HIROAKI HOSHI
  • Patent number: 5995144
    Abstract: In a still video camera or the like which employs a solid-state image sensor, such as a CCD, a first calculation of the amount of correlation in an AF sensor is executed by using a smaller number of pixels and a larger amount of shifting, and second and subsequent calculations of the amount of correlation are executed by using a larger number of pixels and a smaller amount of shifting. Accordingly, it is possible to reliably detect a large-defocus state through the first calculation, whereby it is possible to omit an unnecessary calculation to reduce the required calculation time. The automatic focusing device uses a phase difference detection method in which a focus state is detected by detecting the deviation between two incident images. The device includes two sensor portions for receiving two images which are each a variable in their image forming portions according to a focus state.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: November 30, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takao Sasakura
  • Patent number: 5940241
    Abstract: An image signal recording system for recording an image signal on a recording medium has a first recording mode in which the image signal is recorded only in a first area on the recording medium and a second recording mode in which the image signal is recorded in either of first area and a second area located on the recording medium in a position different from the first area. In the second recording mode, the image signal is recorded starting from the second area, so that image signal recording efficiency can be increased to give a great economic advantage.
    Type: Grant
    Filed: July 22, 1994
    Date of Patent: August 17, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takao Sasakura
  • Patent number: 5929951
    Abstract: A display apparatus is constituted by a planar display device and a planar illumination device therefor. A lowering in light quantity at a periphery of the planar illumination device is prevented by inserting a reflection member, such as a reflection frame, having an inside reflection surface along the periphery of the illumination device, or a combination of a scattering means and a transparent sheet member between the display device and the illumination device. A plurality of the display apparatus may be combined to allow an associate movement thereof so as to constitute a composite display apparatus, such as a head-mount display.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: July 27, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventors: Takao Sasakura, Noritaka Mochizuki, Hiroaki Hoshi
  • Patent number: 5294997
    Abstract: An image signal recording and reproducing system which records on a recording medium one picture amount of high definition image signal composed of a plurality of different field image signals and is arranged as follows: in recording the field image signals in different areas on the recording medium respectively, a modulated carrier signal modulated with an information signal other than an image signal is recorded in a state of being multiplexed with one part of the field image signals; and a pilot signal for correcting time base variations is recorded in a state of being multiplexed with the other part of the field image signals. This arrangement enables the system to record and reproduce information other than the image signal and to reproduce an image with a high degree of fineness by accurately correcting time base variations occurring during recording and reproduction.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: March 15, 1994
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tokihiko Ogura, Kazuhito Ohashi, Ryo Fujimoto, Takao Sasakura
  • Patent number: 5166803
    Abstract: This system is arranged to selectively subject a color or monochrome image signal to the recording signal processing for recording on the recording medium, selectively multiplex a first pilot signal with the color image signal subjected to the recording signal processing or a second pilot signal different from the first pilot signal with the monochrome image signal subjected to the recording signal processing, record the thus-multiplexed signal on the recording medium, detect the pilot signal multiplexed with the signal recorded on the recording medium, discriminate whether the detected pilot signal is the first pilot signal or the second pilot signal, and separate the pilot signal multiplexed with the signal reproduced from the recording medium in accordance with the discrimination result, and correct the time-base variation of the signal reproduced from the recording medium by using the thus-separated pilot signal.
    Type: Grant
    Filed: December 19, 1991
    Date of Patent: November 24, 1992
    Assignee: Canon Kabushiki Kaisha
    Inventor: Takao Sasakura
  • Patent number: 5055351
    Abstract: A magnetic recording medium comprises at least a magnetic recording layer of a metal thin film on a substrate, wherein the stiffness 1/k.sub.O [kgfmm] of the whole medium is within the following range: ##EQU1## [n is a number of layers constituting the magnetic recording medium] E.sub.k : Young's modulus of the k th layer [unit:kgf/mm.sup.2 ]I.sub.k :moment of inertia of the k th layer [unit:mm.sup.3 ]and the shape of the medium is a disc shape.
    Type: Grant
    Filed: October 13, 1988
    Date of Patent: October 8, 1991
    Assignee: Canon Kabushiki Kaisha
    Inventors: Ryo Fujimoto, Katsumi Arisaka, Takao Sasakura, Hiroshi Takagi, Kenji Suzuki, Akira Shinmi, Rieko Kanome, Morimi Hashimoto, Nobuyuki Saito