Patents by Inventor Yutaka Nagai

Yutaka Nagai 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: 20100202270
    Abstract: In a recording apparatus capable of performing a curing process at high speed by curing a plurality of books at a time during recording and capable of performing recording of a recordable type, when recording is stopped once, the unit of books to be cured at a time is set smaller than that during continuous recording, in order to realize inexpensively both performing a curing process at high speed in hologram recording and realizing recording of a recordable type freely in a book unit. It is therefore possible to terminate recording in the unit of arbitrary books irrespective of the unit of books to be cured, and perform recording of a recordable type without loss.
    Type: Application
    Filed: November 25, 2009
    Publication date: August 12, 2010
    Inventors: Yutaka NAGAI, Yusuke Nakamura
  • Publication number: 20090310463
    Abstract: A need to effectively record data of various sizes on a large-capacity holographic memory capable of high-speed recording is achieved, for example, by curing a first part of the holographic recording which is able to be multiplex-recorded in one or more units of a predetermined volume, and by not recording/curing a second part which is not able to be multiplex-recorded in a predetermined volume at a timing when the first recording part is cured. Also the above need can be achieved by, another example, by adding dummy data to the second part. Alternatively, the second part can be recorded on another track, in which it is possible to record in different units, e.g. by bit recording in a track that utilizes a DVD recording format. According to the present examples, we can record data of various sizes on the holographic memory effectively while performing large-capacity and high-speed holographic recording.
    Type: Application
    Filed: June 8, 2009
    Publication date: December 17, 2009
    Inventors: Yutaka Nagai, Koichiro Nishimura, Junya Iizuka
  • Publication number: 20090285061
    Abstract: A technique capable of realizing a power saving in a device for reproducing/recording digital signals by properly controlling a frequency of a clock. The device for reproducing/recording digital signals (device for reproducing an optical disk) includes: a difference comparing circuit for comparing a first parameter (demodulating block counter) updated each time a process for one correcting block is done in a demodulating circuit with a second parameter (error correcting block counter) updated each time a process of one correcting block is done in an error correcting circuit; and a circuit (clock controlling circuit etc.) for switching a frequency of a master clock (MCLK) depending on a comparison result of the difference comparing circuit. Thereby, the frequency of the clock can be switched both of when the demodulation for one correcting block is ended and when the correcting process for one correcting block is ended by using the switched master clock.
    Type: Application
    Filed: May 14, 2009
    Publication date: November 19, 2009
    Inventor: YUTAKA NAGAI
  • Publication number: 20090130647
    Abstract: A method and an apparatus using acridine orange for sorting particles to precisely carry out the measurement of cells in the blood are provided. The cells in the blood is sorted by the steps of staining cells in the blood with acridine orange, irradiating light on the cells in the blood, determining staining behavior using platelets as a staining indicator, and sorting the cells in the blood.
    Type: Application
    Filed: January 29, 2007
    Publication date: May 21, 2009
    Inventors: Yutaka Nagai, Shigeko Yamamoto
  • Publication number: 20090059751
    Abstract: A recording/reproducing apparatus capable of encrypting bus data to a host has a bus encryption circuit and controls the access to a memory. Encryption of data between the recording/reproducing apparatus and the host can be achieved to assure protection of data and contents recorded on an optical disc.
    Type: Application
    Filed: August 29, 2008
    Publication date: March 5, 2009
    Inventors: Masakazu Ikeda, Osamu Kawamae, Yutaka Nagai
  • Patent number: 7477363
    Abstract: A laser light source emits a first light beam irradiating a solution including target particles and being flowed in a flow cell to generate forward scattered light and orthogonal scattered light therefrom. A light emitting diode emits a second light beam irradiating the solution in the flow cell to generate at least one wavelength of fluorescence therefrom. A first detector is adapted to detect the forward scattered light. A second detector is adapted to detect the orthogonal scattered light. At least one third detector is adapted to detect the at least one fluorescence. A first filter is disposed between the flow cell and the third detector and adapted to eliminate scattered light generated from the target particles by the irradiation of the first light beam.
    Type: Grant
    Filed: April 8, 2005
    Date of Patent: January 13, 2009
    Assignee: Nihon Kohden Corporation
    Inventor: Yutaka Nagai
  • Patent number: 7453222
    Abstract: The sun roof drive device opens and closes a vehicle sun roof by a DC brushless motor, which is driven by rectangular waves when high torque is required at a low rotational speed and which is driven by sinusoidal waves or pseudo-sinusoidal waves when low noise is required.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: November 18, 2008
    Assignees: Shinano Kenshi Kabushiki Kaisha, Yachiyo Kogyo Kabushiki Kaisha
    Inventors: Takashi Kanai, Takahiro Maruyama, Yutaka Nagai, Munehiro Kawai, Yoshikazu Ito
  • Publication number: 20080127764
    Abstract: To surely and easily secure a return tube to a nut and prevent the return tube from floating and expanding when circulating failure of balls occurs. The ball screw device has a screw shaft having a helical shaft raceway groove on the outer face thereof, a nut having a nut raceway groove on the inner face so as to oppose to the shaft raceway groove, a load path formed by the shaft raceway groove and the nut raceway groove, balls rotatably mounted in the load path, a communicating member communicating both ends of the load path to guide the balls exterior of the nut and having a bent portion; a tube fixture for fixing the communicating member to the nut and a reinforcement member for receiving stress applied to the bent portion of the communicating member on an outer face of the tube fixture.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 5, 2008
    Applicant: NSK LTD.
    Inventors: Daiju Takahashi, Yutaka Nagai, Masahiro Nobutomo
  • Patent number: 7369231
    Abstract: A blood sample containing leukocytes flows through a flow cell. A light source emits a light beam in a first direction. The light beam incident into the flow cell is scattered by the blood sample as scattered light. A first detector detects an intensity of forward small scattered light out of the scattered light. The first detector is arranged so as to have a maximum angle of a detection angle range for the forward small scattered light stemmed from the first direction at a position inside (outside) of the flow cell, which is 3.1 (4) degrees or less. A second detector detects an intensity of forward large scattered light out of the scattered light. The second detector is arranged so as to have a detection angle range for the forward large scattered light stemmed from the first direction at a position inside (outside) of the flow cell, which falls in a range from 8 to 12 (10 to 16) degrees.
    Type: Grant
    Filed: May 24, 2005
    Date of Patent: May 6, 2008
    Assignee: Nihon Kohden Corporation
    Inventors: Yutaka Nagai, Kazuo Yamagishi, Tomonobu Maruyama
  • Publication number: 20080101209
    Abstract: Each layer includes a data recording area and a test writing area divided into a plurality of small areas, wherein the small areas of the test writing area are recorded in advance so that other each layer can make a combination of recorded and unrecorded states with respect to the small area, where OPC is carried out, in a layer where OPC is carried out. Moreover, OPC is carried out to each small area, where a combination of recorded/unrecorded states of other each layer differs from each other, to thereby calculate, as the optimum power, an average value of the result of each OPC or a central value of the dispersion thereof.
    Type: Application
    Filed: September 27, 2007
    Publication date: May 1, 2008
    Inventors: Yutaka Nagai, Koichiro Nishimura
  • Patent number: 7356514
    Abstract: A reproduction method and apparatus for reproducing video data and/or audio data from a recordable medium having video data and/or audio data recorded thereon. The video data and/or audio data is generated by superimposing information concerning an attribute of a video signal and/or an audio signal on a signal of digitized video data and/or a signal of digitized audio data. Information concerning a copyright superimposed on the video data and/or audio data is reproduced from the medium, and a type of the medium is identified. Reproduction is stopped in response to a determination that the medium is illegally produced, the determination being based on a combination of the information concerning a copyright which is reproduced and the type of the medium identified.
    Type: Grant
    Filed: September 6, 2006
    Date of Patent: April 8, 2008
    Assignee: Hitachi, Ltd.
    Inventors: Yutaka Nagai, Toshifumi Takeuchi
  • Patent number: 7349302
    Abstract: For protecting the recording from shifting in the position, by conducting sync detection, correctly, from land pre pits, in an optical type recording disc, even if sync pattern errors, in more detail, synchronization is conducted on a recording circuit, with certainty, even if an even sync pattern erroneously changes into an odd sync pattern. When the even sync pattern is detected from an odd sync pattern detection window, a sync lock flag is turned into a condition of unlock. When the sync lock flag continues a lock condition for 16 sectors, the synchronization is carried out on a detection cycle counter and a recording cycle counter.
    Type: Grant
    Filed: August 15, 2003
    Date of Patent: March 25, 2008
    Assignees: Hitachi, Ltd., Hitachi-LG Data Storage, Inc.
    Inventors: Yutaka Nagai, Takehiko Sekine
  • Publication number: 20080025170
    Abstract: A reproduction method ad apparatus for reproducing video data and/or audio data from a medium dedicated to reproduction or recordable medium having video data and/or audio data recorded thereon, the video data and/or audio data being generated by superimposing information concerning an attribute of a video signal and/or an audio signal on a signal of digitized video data and/or a signal of digitized audio data. The information concerning an attribute superimposed on the video data and/or audio data from the medium is reproduced and a type of the medium is identified as a medium dedicated to reproduction or as a recordable medium. Reproduction is stopped in response to a determination that the medium is illegally produced, the determination being based on a combination of the information concerning the attribute which is reproduced and the type of the medium identified.
    Type: Application
    Filed: October 3, 2007
    Publication date: January 31, 2008
    Inventors: Yutaka Nagai, Toshifumi Takeuchi
  • Patent number: 7322131
    Abstract: An object of the present invention is to enhance durability of the non-slip member of the shoe where a lot of non-slip protuberances are fixed to the surface of a base fabric. The shoe of the present invention comprises an upper 20 that covers an instep of a foot, a sole 21 having a ground contact surface and a non-slip member 1 provided on an outer surface of the upper 20 and/or the sole 21. The non-slip member 1 comprises a base fabric 12composed of a knitted fabric of a multilayer structure, the base fabric including an external knitted fabric layer 123 having a first surface 121 exposed to the outside and an internal knitted fabric layer 124 having a second surface 122 on a opposite side of the first surface 121 and a plurality of resin or rubber non-slip protuberances 1 that are fixed to the base fabric 12 and protrude from the first surface 121 of the external knitted fabric layer 123.
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: January 29, 2008
    Assignee: ASICS Corp.
    Inventors: Yoshio Yamashita, Yasuhiro Morikawa, Yutaka Nagai
  • Publication number: 20070182218
    Abstract: The sun roof drive device opens and closes a vehicle sun roof by a DC brushless motor, which is driven by rectangular waves when high torque is required at a low rotational speed and which is driven by sinusoidal waves or pseudo-sinusoidal waves when low noise is required.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 9, 2007
    Inventors: Takashi Kanai, Takahiro Maruyama, Yutaka Nagai, Munehiro Kawai, Yoshikazu Ito
  • Publication number: 20070104460
    Abstract: A disk-like recording medium recording/reproducing method or apparatus for performing a data recording operation and a data reproducing operation to the disk-like recording medium alternately. The recording operation is performed at a constant linear velocity, and whether a recording area at an ending point of an n-th recording operation on the medium is continuous to a recording area at a starting point of an (n+1) the recording operation is identified. When a discontinuation of the recording area is identified, the rotational speed at the starting point of the (n+1)th recording operation is changed, during a reproducing operation between the n-th recording operation and the (n+1)th recording operation. When a continuation of the recording area is identified, the rotational speed of the disk-like recording medium at the ending point of the n-th recording operation is held, during a reproducing operation between the n-th recording operation and the (n+1)th recording operation.
    Type: Application
    Filed: December 26, 2006
    Publication date: May 10, 2007
    Inventors: Yutaka Nagai, Toshifumi Takeuchi, Shigemitsu Higuchi
  • Patent number: 7174092
    Abstract: A disk-shaped recording medium recording/reproducing method for performing a data recording operation and a data reproducing operation to the disk-shaped recording medium alternately includes identifying whether a recording area at an ending point of an n-th recording operation on the disk-shaped recording medium, where n is a natural number, is continuous to a recording area at a starting point of (n+1) recording operation. In response to an identifying result indicative of discontinuation of the recording area in the identifying step, the rotational speed of the disk-shaped recording medium is changed to a rotational speed at the starting point of the (n+1)th recording operation, during a reproducing operation between the n-th recording operation and the (n+1)th recording operation.
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: February 6, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Yutaka Nagai, Toshifumi Takeuchi, Shigemitsu Higuchi
  • Publication number: 20070003218
    Abstract: A reproduction method and apparatus for reproducing video data and/or audio data from a recordable medium having video data and/or audio data recorded thereon. The video data and/or audio data is generated by superimposing information concerning an attribute of a video signal and/or an audio signal on a signal of digitized video data and/or a signal of digitized audio data. Information concerning a copyright superimposed on the video data and/or audio data is reproduced from the medium, and a type of the medium is identified. Reproduction is stopped in response to a determination that the medium is illegally produced, the determination being based on a combination of the information concerning a copyright which is reproduced and the type of the medium identified.
    Type: Application
    Filed: September 6, 2006
    Publication date: January 4, 2007
    Inventors: Yutaka Nagai, Toshifumi Takeuchi
  • Patent number: 7117181
    Abstract: Assuming that copying is permitted only once in broadcasting or the like, there is provided a reproduction apparatus and a reproduction method of digital video signal or audio signal for preventing a pirated edition disk which is produced by recording a signal onto a DVD-R disk (capable of recording the signal once), a DVD-RAM disk (rewritable), or the like and thereafter illegally copying the recorded signal to a DVD-ROM, from being reproduced by an ordinary user's player capable of reproducing DVD-ROM, DVD-R and DVD-RAM disks. Furthermore, in the case where reproduction is inhibited, the cause of the reproduction stoppage is reported correctly. In the case where the copying permission information superimposed on the video signal indicates that copying of only one generation was permitted and the disk is judged to be a DVD-ROM, reproduction is inhibited.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: October 3, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Yutaka Nagai, Toshifumi Takeuchi
  • Patent number: 7092078
    Abstract: A blood sample containing leukocytes flows through a flow cell. A light source emits a light beam in a first direction. The light beam incident into the flow cell is scattered by the blood sample as scattered light. A first detector detects an intensity of forward small scattered light out of the scattered light. The first detector is arranged so as to have a maximum angle of a detection angle range for the forward small scattered light stemmed from the first direction at a position inside (outside) of the flow cell, which is 3.1 (4) degrees or less. A second detector detects an intensity of forward large scattered light out of the scattered light. The second detector is arranged so as to have a detection angle range for the forward large scattered light stemmed from the first direction at a position inside (outside) of the flow cell, which falls in a range from 8 to 12 (10 to 16) degrees.
    Type: Grant
    Filed: March 31, 2003
    Date of Patent: August 15, 2006
    Assignee: Nihon Kohden Corporation
    Inventors: Yutaka Nagai, Kazuo Yamagishi, Tomonobu Maruyama