Patents by Inventor Yoshiaki Kuwahara

Yoshiaki Kuwahara 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: 20220321730
    Abstract: An image reading apparatus includes: a conveyance portion configured to convey a first medium; a first imaging portion; a first reading processing portion configured to cause the first imaging portion to read a first image of a first reading surface of the first medium conveyed by the conveyance portion; a second imaging portion; a second reading processing portion configured to cause the second imaging portion to read a second image of the second reading surface of the second medium by scanning while the second imaging portion is being moved along a second reading surface of a second medium placed on a medium placement surface; a reading control portion configured to control the first reading processing portion and the second reading processing portion to operate in parallel with each other; and a synthesis processing portion configured to generate a synthesized image by synthesizing the first image and the second image.
    Type: Application
    Filed: March 9, 2022
    Publication date: October 6, 2022
    Inventors: Kunihiko Tanaka, Tomohiro Kuwahara, Yoshiaki Yasui
  • Patent number: 11420507
    Abstract: A power train support structure includes a first front side frame disposed on one of left and right sides of a power train; a second front side frame disposed on the other of the left and right sides of the power train, and being greatly away from the power train with respect to the first front side frame; a mounting bracket having one of left and right ends connected to the power train; and a connecting member for connecting the mounting bracket and the second front side frame. The mounting bracket includes a front fixing portion and a rear fixing portion to be fixed to the power train. A strength of the front fixing portion and the rear fixing portion is set to such a strength that the rear fixing portion is broken by a collision load from a front side, and the front fixing portion is not broken.
    Type: Grant
    Filed: March 6, 2020
    Date of Patent: August 23, 2022
    Assignee: MAZDA MOTOR CORPORATION
    Inventors: Wataru Kuwahara, Takashi Hamada, Yuuki Uchiba, Yuya Yamaoka, Yusuke Oki, Masaaki Kashimoto, Ryuichiro Amano, Yoshiaki Noguchi, Kazuki Kamimura
  • Publication number: 20220263645
    Abstract: A synchronization detection device includes: a correction unit configured to correct sampled data of a waveform on which a dither signal is superimposed, for each period of a reference signal in accordance with a period of the dither signal; a multiplication unit configured to multiply the corrected sampled data by a weight coefficient that is different for each level of the reference signal and associated with a timing of the reference signal; and an averaging unit configured to derive, as a detection result, an average of a result of the multiplication of the corrected sampled data by the weight coefficient.
    Type: Application
    Filed: July 25, 2019
    Publication date: August 18, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroto KAWAKAMI, Shoichiro KUWAHARA, Yoshiaki KISAKA
  • Patent number: 11397363
    Abstract: A control processor performs, in a startup sequence of an IQ optical modulator using a nested MZI, a first-stage process of controlling, so that a signal quality of an optical QAM signal output from a monitor port of the IQ optical modulator approaches a target quality, a voltage applied by a Bias_I voltage generator to I-component MZ optical modulator, a voltage applied by a Bias_Q voltage generator to a Q-component MZ optical modulator, and a voltage applied by a Bias_Ph voltage generator to a Bias_Ph phase adjusting means for controlling an optical path length of a parent MZI. After a completion of the first-stage process, the control processor changes a voltage output from the Bias_Ph voltage generator by a predetermined amount.
    Type: Grant
    Filed: May 15, 2019
    Date of Patent: July 26, 2022
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Hiroto Kawakami, Shoichiro Kuwahara, Yoshiaki Kisaka, Masanori Nakamura
  • Publication number: 20220216923
    Abstract: An optical transmission system according to an embodiment includes: an optical transmission unit which modulates an optical signal into which a known signal is inserted and transmits the optical signal; and an optical reception unit which receives the optical signal from the optical transmission unit, wherein the optical reception unit includes: an optical receiver which performs coherent detection of a reception signal of the optical signal received from the optical transmission unit; a receiver transfer function estimation section which estimates a nonlinear response transfer function of the optical receiver based on the known signal included in the reception signal after the detection by the optical receiver; and a receiver compensation section which compensates nonlinear distortion of the reception signal after the detection based on the nonlinear response transfer function which the receiver transfer function estimation section estimates.
    Type: Application
    Filed: May 23, 2019
    Publication date: July 7, 2022
    Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Asuka MATSUSHITA, Masanori NAKAMURA, Kengo HORIKOSHI, Shoichiro KUWAHARA, Yoshiaki KISAKA
  • Patent number: 7861034
    Abstract: A storage system stores multiple copies of data on physical storage implemented, for example, with multiple disk units. Input/output read requests are received from host systems and distributed in a manner that allows parallel read operations to be conducted over the multiple disk units of the physical storage.
    Type: Grant
    Filed: February 12, 2007
    Date of Patent: December 28, 2010
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Publication number: 20080041097
    Abstract: The present invention aims to provide a refrigerant distribution device which eliminates a need for maintaining a certain length of a straight portion at an inflow tube to a distributor, and for adjusting lengths of capillary tubes to send a refrigerant to each flow path of the refrigerant of a heat exchanger, and which resolves an unevenness of a liquid refrigerant at a bend of the inflow tube due to a centrifugal force. A refrigerant distribution device according to the present invention including an inflow tube, which is connected to a distributor for distributing and providing a refrigerant in a gas-liquid two-phase state to a heat exchanger, wherein an upstream side of the inflow tube is in an approximately horizontal position and a downstream side of the inflow tube is bent to stand approximately at a right angle, includes a bend of the inflow tube, a longitudinal form of which is made of a combination of straight lines and is bent approximately at a right angle.
    Type: Application
    Filed: August 20, 2007
    Publication date: February 21, 2008
    Applicant: Mitsubishi Electric Corporation
    Inventors: Ryo Oya, Kazunobu Sekiguchi, Masahiko Takagi, Ryoji Abe, Yoshiaki Kuwahara
  • Publication number: 20070239958
    Abstract: A storage system stores multiple copies of data on physical storage implemented, for example, with multiple disk units. Input/output read requests are received from host systems and distributed in a manner that allows parallel read operations to be conducted over the multiple disk units of the physical storage.
    Type: Application
    Filed: February 12, 2007
    Publication date: October 11, 2007
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Patent number: 7254674
    Abstract: A method of respectively reading and writing data to and from a plurality of physical disk units in response to I/O requests from a host computing system includes establishing a logical disk group having a number of logical disk elements, mapping each of the logical disk elements to corresponding physical disk units, receiving from the host computing system an I/O request for data to select a one of the number of logical disk elements, accessing the physical disk unit corresponding to the selected one logical disk to access for the data, and transferring the accessed data to the host computing system.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: August 7, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Patent number: 7082496
    Abstract: In an information processing system having a data processing apparatus, a control unit for a cache memory, and a storage unit for storing a record, respectively interconnected together, wherein when the control unit receives from the data processing apparatus a write request for a record to be written and if the record to be written is not being stored in the cache memory, the control unit receives a data to be written in the object record from the data processing apparatus and stores the received data in the cache memory. After notifying the data processing apparatus of a completion of a data write process, the control unit checks if the object record in which the data stored in the cache memory is being stored in the storage unit, if the object record is being stored in the storage unit, the data in the cache memory is written in the storage unit, and if not, the data in the cache memory is not written and such effect is notified to the data processing apparatus.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: July 25, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Akira Kurano, Masafumi Nozawa, Hiroyuki Kitajima
  • Publication number: 20050240728
    Abstract: The control unit arbitrarily with respect to the CPU, including according to an algorithm that is independent of the request a disk unit among the disk units that are inactive when the control unit receives an input/output request involving either read or staging. For a write request from the CPU, the control unit selects a specific disk unit in the disk unit group for the immediate writing of data. In the second kind of load distribution a disk unit is selected to execute read and staging other than the above-mentioned specific disk.
    Type: Application
    Filed: June 27, 2005
    Publication date: October 27, 2005
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Patent number: 6938125
    Abstract: A disk storage system has a control unit having a plurality of external ports connectable to a mirrored disk including two disks to which write data is written. When the control unit receives two read requests issued from a processor to the disk unit group, a first read operation is performed to read data requested by the first read request from one of the disks and a second read operation is performed to read data requested by the second read request from the other one of the disks. Also, a first transferring operation is performed to transfer data read by the first read operation to one external port of the control unit and a second transferring operation is performed to transfer data read by the second read operation to another external port of the control unit. Further, the data read by the two read operations is transferred to the processor via the external ports.
    Type: Grant
    Filed: August 6, 2003
    Date of Patent: August 30, 2005
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Publication number: 20040177220
    Abstract: A storage system stores multiple copies of data on physical storage implemented, for example, with multiple disk units. Input/output read requests are received from host systems and distributed in a manner that allows parallel read operations to be conducted over the multiple disk units of the physical storage.
    Type: Application
    Filed: March 11, 2004
    Publication date: September 9, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Patent number: 6728832
    Abstract: A method of respectively reading and writing data to and from a plurality of physical disk units in response to I/O requests from a host computing system includes establishing a logical disk group having a number of logical disk elements, mapping each of the logical disk elements to corresponding physical disk units, receiving from the host computing system an I/O request for data to select a one of the number of logical disk elements, accessing the physical disk unit corresponding to the selected one logical disk to access for the data, and transferring the accessed data to the host computing system.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: April 27, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Publication number: 20040030829
    Abstract: The control unit arbitrarily with respect to the CPU, including according to an algorithm that is independent of the request a disk unit among the disk units that are inactive when the control unit receives an input/output request involving either read or staging. For a write request from the CPU, the control unit selects a specific disk unit in the disk unit group for the immediate writing of data. In the second kind of load distribution a disk unit is selected to execute read and staging other than the above-mentioned specific disk.
    Type: Application
    Filed: August 6, 2003
    Publication date: February 12, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Publication number: 20040030828
    Abstract: In an information processing system having a data processing apparatus, a control unit for a cache memory, and a storage unit for storing a record, respectively interconnected together, wherein when the control unit receives from the data processing apparatus a write request for a record to be written and if the record to be written is not being stored in the cache memory, the control unit receives a data to be written in the object record from the data processing apparatus and stores the received data in the cache memory. After notifying the data processing apparatus of a completion of a data write process, the control unit checks if the object record in which the data stored in the cache memory is being stored in the storage unit, if the object record is being stored in the storage unit, the data in the cache memory is written in the storage unit, and if not, the data in the cache memory is not written and such effect is notified to the data processing apparatus.
    Type: Application
    Filed: August 4, 2003
    Publication date: February 12, 2004
    Applicant: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Shigeo Homma, Yoshihiro Asaka, Yoshiaki Kuwahara, Akira Kurano, Masafumi Nozawa, Hiroyuki Kitajima
  • Patent number: 6631443
    Abstract: A disk storage system has a control unit having a plurality of external ports connectable to a mirrored disk including two disks to which write data is written. When the control unit receives two read requests issued from a processor to the disk unit group, a first read operation is performed to read data requested by the first read request from one of the disks and a second read operation is performed to read data requested by the second read request from the other one of the disks. Also, a first transferring operation is performed to transfer data read by the first read operation to one external port of the control unit and a second transferring operation is performed to transfer data read by the second read operation to another external port of the control unit. Further, the data read by the two read operations is transferred to the processor via the external ports.
    Type: Grant
    Filed: July 18, 2000
    Date of Patent: October 7, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Publication number: 20010023463
    Abstract: A storage system stores multiple copies of data on physical storage implemented, for example, with multiple disk units. Input/output read requests are received from host systems and distributed in a manner that allows parallel read operations to be conducted over the multiple disk units of the physical storage.
    Type: Application
    Filed: March 20, 2001
    Publication date: September 20, 2001
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima
  • Patent number: 6250372
    Abstract: An air condition includes a suction grill for sucking the air in a room, a front panel including an inlet port for sucking the air from the suction grill inside and a blowout port for blowing the air out into the room, a heat exchanger for heat exchange of the air, and a blower for circulating the air, wherein a concave air passage for room temperature detection is formed on the front face of the front panel, and an air suction port for sucking air for room temperature detection is formed in suction grill at an opposite part to air passage.
    Type: Grant
    Filed: October 8, 1999
    Date of Patent: June 26, 2001
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yasuyuki Arai, Masaharu Miwa, Tetsuji Uchiyama, Yoshiaki Kuwahara, Kengo Takahashi
  • Patent number: 6108750
    Abstract: A disk storage system has a control unit having a plurality of external connection points. When the control unit receives two read requests issued from a processor to two disks of a disk unit group, a first read operation is performed to read data requested by the first read request from one of the disks and a second read operation is performed to read data requested by the second read request from the other one of the disks. Also, a first output operation is performed to output data read by the first read operation from one of the external connection points of the control unit and a second output operation is performed to output data read by the second read operation from another of the external connection points of the control unit. The second output operation is started before the first output operation has finished.
    Type: Grant
    Filed: July 16, 1998
    Date of Patent: August 22, 2000
    Assignee: Hitachi, Ltd.
    Inventors: Akira Yamamoto, Takao Satoh, Shigeo Honma, Yoshihiro Asaka, Yoshiaki Kuwahara, Hiroyuki Kitajima