Patents by Inventor Kei Hagiwara

Kei Hagiwara 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).

  • Patent number: 11966176
    Abstract: A transfer member includes: an inner layer; and an outer layer that is adhered to the inner layer and has a hardness lower than a hardness of the inner layer.
    Type: Grant
    Filed: November 18, 2021
    Date of Patent: April 23, 2024
    Assignee: FUJIFILM Business Innovation Corp.
    Inventors: Hirotaka Tanaka, Tomoaki Yoshioka, Yoko Miyamoto, Toshiaki Baba, Koichiro Yuasa, Kazuyoshi Hagiwara, Kei Tanaka
  • Publication number: 20240113578
    Abstract: According to one embodiment, a rotary electric machine includes a rotor and a stator. The rotor includes a rotary shaft, a first core, a permanent magnet, and an intermediate member. The rotary shaft extends in a first direction. The first core is provided around the rotary shaft in a first plane perpendicular to the first direction. The permanent magnet is provided around the first core in the first plane. The intermediate member is provided between the rotary shaft and the first core. The intermediate member includes a first portion containing a carbon fiber, and a second portion aligned with the first portion in the first direction and containing a metal. The stator is provided around the rotor in the first plane.
    Type: Application
    Filed: October 2, 2023
    Publication date: April 4, 2024
    Inventors: Eri KINOSHITA, Yasuaki HADAME, Masaya HAGIWARA, Kei MATSUOKA
  • Publication number: 20200264219
    Abstract: The abnormality detection device includes a first extraction unit extracting an input waveform data from a waveform data input to the first extraction unit, a first determination unit for determining whether the input waveform data includes a detection object waveform data, a second extraction unit for extracting and outputting the detection object waveform data from the input waveform data when the input waveform data is determined to include the detection object waveform data by the first determination unit; and a second determination unit for determining whether the detection target device has an abnormality based on whether the detection object waveform output from the second extraction unit indicates an abnormality.
    Type: Application
    Filed: February 6, 2020
    Publication date: August 20, 2020
    Inventor: Kei HAGIWARA
  • Patent number: 7558172
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Grant
    Filed: May 15, 2007
    Date of Patent: July 7, 2009
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Publication number: 20070223330
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Application
    Filed: May 15, 2007
    Publication date: September 27, 2007
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Patent number: 7230891
    Abstract: An optical disk device record data on a recordable or rewritable optical disk. After a pause and a restart in the constant angular velocity (CAV) method occurs predetermined times due to a cause of a recording error such as a buffer underrun, the data-recording by the CAV method is, for the first time, switched to the data-recording by the constant linear velocity (CLV) method at a recording velocity equal to or less than a recording velocity just before the last pause so as to provide a recording density equal to said constant recording density when said pausing is performed.
    Type: Grant
    Filed: October 3, 2005
    Date of Patent: June 12, 2007
    Assignee: Ricoh Company, Ltd.
    Inventor: Kei Hagiwara
  • Publication number: 20070115774
    Abstract: An information recording method and an information recording apparatus are disclosed, which are mainly applicable to a multilayer optical recording medium, recording on a layer being carried out from outer circumference to inner circumference, such as in an OTP method. The information recording method includes a step of trial writing for writing data on a trial writing area of the optical recording medium while gradually changing recording power for laser irradiation, and obtaining optimal recording power based on a reproduced signal of the data that are trial-written in advance of starting a recording operation, and a step of adjusting the obtained optimal recording power according to a recording-start position, and starting the recording operation using the adjusted optimal recording power.
    Type: Application
    Filed: October 3, 2005
    Publication date: May 24, 2007
    Inventor: Kei Hagiwara
  • Patent number: 7079475
    Abstract: An apparatus for detecting pre-pit information is disclosed, including an optical pickup, an optical-detecting section, a difference-detecting circuit, a first peak-value detecting circuit, a filtering circuit, a second peak-value detecting circuit, a differential potential-dividing circuit, and a comparator.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: July 18, 2006
    Assignee: Ricoh Company, Ltd.
    Inventor: Kei Hagiwara
  • Publication number: 20060023589
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Application
    Filed: October 3, 2005
    Publication date: February 2, 2006
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Publication number: 20060023592
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Application
    Filed: October 3, 2005
    Publication date: February 2, 2006
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Patent number: 6987717
    Abstract: An information recording device for writing information in a circumferential direction of a disk-type recording medium, with a substantially constant linear density.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: January 17, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Kei Hagiwara, Haruyuki Suzuki
  • Publication number: 20050122884
    Abstract: An apparatus for detecting pre-pit information is disclosed, including an optical pickup, an optical-detecting section, a difference-detecting circuit, a first peak-value detecting circuit, a filtering circuit, a second peak-value detecting circuit, a differential potential-dividing circuit, and a comparator.
    Type: Application
    Filed: August 27, 2004
    Publication date: June 9, 2005
    Inventor: Kei Hagiwara
  • Publication number: 20020044507
    Abstract: An optical disk device records data on a recordable or rewritable optical disk. The optical disk device comprises zone storing means for preliminarily storing locations of a plurality of zones set by dividing a recordable or rewritable area of the optical disk from an inner periphery thereof to an outer periphery thereof, position detecting means for detecting a position on the optical disk so as to record data at the position, judging means for judging which of the zones the position corresponds to by referring to the zone storing means, and controlling means for controlling the device to perform a data-recording by a CLV method to each of the zones specified by the judging means by setting a recording velocity and a recording power for each of the zones so as to enable the data-recording to provide an equal recording density to all of the zones.
    Type: Application
    Filed: August 8, 2001
    Publication date: April 18, 2002
    Inventors: Kei Hagiwara, Haruyuki Suzuki