Patents by Inventor Keiichi Murakami

Keiichi Murakami 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: 11383493
    Abstract: A window film including at least a first adhesive layer containing a weathering agent, a barrier layer, a second adhesive layer, and a light control layer in this order.
    Type: Grant
    Filed: November 10, 2014
    Date of Patent: July 12, 2022
    Assignee: DAI NIPPON PRINTING CO., LTD.
    Inventors: Keiichi Murakami, Masato Idegami, Anri Takarabe, Shingo Namatame, Masahiro Tatsuzawa
  • Patent number: 11316592
    Abstract: An optical module includes a photoelectric converter configured to receive an optical signal having an intensity that changes at one of a first frequency or a second frequency that is higher than the first frequency, and convert the optical signal into a current signal corresponding to the intensity of the optical signal; a signal processor configured to acquire, when the optical signal has the intensity that changes at the first frequency, wavelength information set on a transmitting side based on a ratio between a plurality of signal intensities included in the current signal relating to the optical signal having the intensity that changes at the first frequency; and a decoder configured to generate, when the optical signal has the intensity that changes at the second frequency, communication data from the current signal relating to the optical signal having the intensity that changes at the second frequency.
    Type: Grant
    Filed: February 9, 2021
    Date of Patent: April 26, 2022
    Assignee: Lumentum Japan, Inc.
    Inventors: Koki Sato, Masaaki Furukawa, Keiichi Murakami, Takuya Sato
  • Patent number: 11209586
    Abstract: A see-through image display system having a DOE often has undesirable light or so called ghost images due to the quantization of saw tooth shape of DOE surface. This invention provides ways to eliminate ghost images.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: December 28, 2021
    Assignees: NTT DOCOMO, INC.
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Aburakawa, Keiichi Murakami
  • Patent number: 11073694
    Abstract: A see-through image display system having a laser-beam-scanner has a very small eyebox when a laser beam is directly projected into eye. This invention provides a solution to increase the size of eyebox using a free-form-mirror to create a real image with high NA without exit-pupil-expander.
    Type: Grant
    Filed: December 15, 2017
    Date of Patent: July 27, 2021
    Assignees: NTT DOCOMO, Inc.
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Abrakawa, Keiichi Murakami
  • Patent number: 11061224
    Abstract: A see-through image display system having an Exit-Pupil-Expander (EPE) to enlarge the eyebox of display is disclosed. The EPE uses a hologram functioning as a micro-lens-array as well as collimation lens.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: July 13, 2021
    Assignees: NTT DOCOMO, INC.
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Aburakawa, Keiichi Murakami
  • Publication number: 20210167862
    Abstract: An optical module includes a photoelectric converter configured to receive an optical signal having an intensity that changes at one of a first frequency or a second frequency that is higher than the first frequency, and convert the optical signal into a current signal corresponding to the intensity of the optical signal; a signal processor configured to acquire, when the optical signal has the intensity that changes at the first frequency, wavelength information set on a transmitting side based on a ratio between a plurality of signal intensities included in the current signal relating to the optical signal having the intensity that changes at the first frequency; and a decoder configured to generate, when the optical signal has the intensity that changes at the second frequency, communication data from the current signal relating to the optical signal having the intensity that changes at the second frequency.
    Type: Application
    Filed: February 9, 2021
    Publication date: June 3, 2021
    Inventors: Koki SATO, Masaaki FURUKAWA, Keiichi MURAKAMI, Takuya SATO
  • Patent number: 10944479
    Abstract: An optical module includes a photoelectric converter configured to receive an optical signal having an intensity that changes at one of a first frequency or a second frequency that is higher than the first frequency, and convert the optical signal into a current signal corresponding to the intensity of the optical signal; a signal processor configured to acquire, when the optical signal has the intensity that changes at the first frequency, wavelength information set on a transmitting side based on a ratio between a plurality of signal intensities included in the current signal relating to the optical signal having the intensity that changes at the first frequency; and a decoder configured to generate, when the optical signal has the intensity that changes at the second frequency, communication data from the current signal relating to the optical signal having the intensity that changes at the second frequency.
    Type: Grant
    Filed: March 27, 2020
    Date of Patent: March 9, 2021
    Assignee: Lumentum Japan, Inc.
    Inventors: Koki Sato, Masaaki Furukawa, Keiichi Murakami, Takuya Sato
  • Patent number: 10883634
    Abstract: A metal seal can be crushed evenly without forming wrinkles and scratches due to sliding against first and second flat surfaces. The seal comprises a first/second end surface arranged to face the first/second flat surface, respectively. The first end surface comprises a first convex part having a curved or flat surface that contacts the first flat surface, and a first projection that is formed shifted in a radial direction from the first convex part and has a ridge line that contacts the first flat surface. Prior to deformation, when the second end surface contacts the second flat surface and the first flat surface is separated from the first end surface, a point where a vertical distance between the first convex part and the second flat surface is the greatest and the ridge line are located on the same surface that is parallel to the first flat surface.
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: January 5, 2021
    Assignees: KUMAMOTO PREFECTURE, HORIBA STEC, CO., LTD.
    Inventors: Makoto Uemura, Hiroki Miyaji, Keiichi Murakami
  • Publication number: 20200409143
    Abstract: A see-through image display system having an Exit-Pupil-Expander (EPE) to enlarge the eyebox of display is disclosed. The EPE uses a hologram functioning as a micro-lens-array as well as collimation lens.
    Type: Application
    Filed: December 14, 2017
    Publication date: December 31, 2020
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Abrakawa, Keiichi Murakami
  • Patent number: 10869858
    Abstract: It is an object of the present invention to provide a novel therapeutic agent and method for treating amyotrophic diseases, and more specifically a therapeutic agent and method for treating neurogenic amyotrophic disorders such as amyotrophic lateral sclerosis (ALS) and myogenic amyotrophic disorders such as sarcopenia or disuse muscle atrophy. Provided is a therapeutic agent for amyotrophic diseases that comprises one or more compounds selected from the group consisting of compounds represented by the formula (I), the formula (II) and the formula (III), and pharmaceutically acceptable salts of the compounds when R3 represents OH.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: December 22, 2020
    Assignee: Tohoku University
    Inventors: Takaaki Abe, Masakuni Horiguchi, Yuji Matsumoto, Maiko Nagayasu, Keiichi Murakami
  • Publication number: 20200322059
    Abstract: An optical module includes a photoelectric converter configured to receive an optical signal having an intensity that changes at one of a first frequency or a second frequency that is higher than the first frequency, and convert the optical signal into a current signal corresponding to the intensity of the optical signal; a signal processor configured to acquire, when the optical signal has the intensity that changes at the first frequency, wavelength information set on a transmitting side based on a ratio between a plurality of signal intensities included in the current signal relating to the optical signal having the intensity that changes at the first frequency; and a decoder configured to generate, when the optical signal has the intensity that changes at the second frequency, communication data from the current signal relating to the optical signal having the intensity that changes at the second frequency.
    Type: Application
    Filed: March 27, 2020
    Publication date: October 8, 2020
    Inventors: Koki SATO, Masaaki FURUKAWA, Keiichi MURAKAMI, Takuya SATO
  • Publication number: 20200271931
    Abstract: A see-through image display system having a laser-beam-scanner has a very small eyebox when a laser beam is directly projected into eye. This invention provides a solution to increase the size of eyebox using a free-form-mirror to create a real image with high NA without exit-pupil-expander.
    Type: Application
    Filed: December 15, 2017
    Publication date: August 27, 2020
    Inventors: Fusao Ishii, Mikiko Nakanishi, Kazuhiko Takahashi, Yuji Abrakawa, Keiichi Murakami
  • Patent number: 10730092
    Abstract: A pressed article manufacturing method employing a press mold equipped with a punch and a die to manufacture a pressed article including a first wall, a second wall extending out from an end portion on at least one length direction side of the first wall toward a back face side of the first wall, and a third wall extending out from a leading end portion of the second wall toward a front face side of the second wall. The manufacturing method includes using the punch and the die to apply pressure to and grip a portion on a base end side of the second wall in a first warp shape in which the base end side portion is warped so as to be convex on a back face side of the second wall as viewed in lateral cross-section in a state prior to demolding from the press mold.
    Type: Grant
    Filed: June 26, 2015
    Date of Patent: August 4, 2020
    Assignee: NIPPON STEEL CORPORATION
    Inventors: Takashi Miyagi, Misao Ogawa, Toshimitsu Aso, Yasuharu Tanaka, Keiichi Murakami
  • Patent number: 10539798
    Abstract: A see-through image display system with high resolution up to 4K, wide field of view (FOV) beyond 60 degrees and small form factor is proposed. The optics for the display incorporates optical elements including hologram, DOE, lens and mirror with free form surfaces. This display system is suitable for a wearable display.
    Type: Grant
    Filed: July 15, 2017
    Date of Patent: January 21, 2020
    Assignees: DOCOMO Incorporated
    Inventors: Fusao Ishii, Yuji Aburakawa, Kazuhiko Takahashi, Keiichi Murakami, Mikiko Nakanishi
  • Patent number: 10520808
    Abstract: Manufacturing methods are disclosed to produce DOE, HOE and Fresnel optical elements. These methods enable low cost manufacturing with high precision. The methods include lithography, roll-to-roll imprint and UV-casting.
    Type: Grant
    Filed: November 11, 2017
    Date of Patent: December 31, 2019
    Assignees: DOCOMO Incorporated
    Inventors: Fusao Ishii, Nakanishi Mikiko, Takahashi Kazuhiko, Abrakawa Yuji, Keiichi Murakami
  • Patent number: 10386563
    Abstract: A compact illuminator for a see-through image display system with highly uniform light distribution is disclosed. This invention enables wearable displays such as eye-glass type see-through display. This system provides a wide divergent beam from a display device so that a viewer can have a large eyebox.
    Type: Grant
    Filed: July 15, 2017
    Date of Patent: August 20, 2019
    Assignees: NTT DOCOMO, Inc.
    Inventors: Fusao Ishii, Yuji Aburakawa, Kazuhiko Takahashi, Keiichi Murakami, Mikiko Nakanishi
  • Patent number: 10312662
    Abstract: To provide an optical module whose power consumption in an ambient temperature range is reduced, and an optical transmission equipment. The optical module includes: a housing; a box type optical subassembly including a bottom portion serving as a heat dissipation face; and a heat conductive member disposed between the bottom portion of the optical subassembly and a bottom portion of the housing. The optical subassembly includes one or a plurality of optical semiconductor devices, and a temperature controller on which the one or plurality of optical semiconductor devices are mounted and which is placed on an inner bottom portion of the optical subassembly. The heat conductive member is disposed only at a portion of the bottom portion of the optical subassembly.
    Type: Grant
    Filed: June 8, 2018
    Date of Patent: June 4, 2019
    Assignee: Oclaro Japan, Inc.
    Inventors: Takuya Sato, Keiichi Murakami, Koki Sato
  • Publication number: 20190162339
    Abstract: A metal seal can be crushed evenly without forming wrinkles and scratches due to sliding against first and second flat surfaces. The seal comprises a first/second end surface arranged to face the first/second flat surface, respectively. The first end surface comprises a first convex part having a curved or flat surface that contacts the first flat surface, and a first projection that is formed shifted in a radial direction from the first convex part and has a ridge line that contacts the first flat surface. Prior to deformation, when the second end surface contacts the second flat surface and the first flat surface is separated from the first end surface, a point where a vertical distance between the first convex part and the second flat surface is the greatest and the ridge line are located on the same surface that is parallel to the first flat surface.
    Type: Application
    Filed: November 27, 2018
    Publication date: May 30, 2019
    Inventors: Makoto Uemura, Hiroki Miyaji, Keiichi Murakami
  • Publication number: 20190079395
    Abstract: Manufacturing methods are disclosed to produce DOE, HOE and Fresnel optical elements. These methods enable low cost manufacturing with high precision. The methods include lithography, roll-to-roll imprint and UV-casting.
    Type: Application
    Filed: November 11, 2017
    Publication date: March 14, 2019
    Inventors: Fusao Ishii, Nakanishi Mikiko, Takahashi Kazuhiko, Abrakawa Yuji, Keiichi Murakami
  • Publication number: 20190054066
    Abstract: It is an object of the present invention to provide a novel therapeutic agent and method for treating amyotrophic diseases, and more specifically a therapeutic agent and method for treating neurogenic amyotrophic disorders such as amyotrophic lateral sclerosis (ALS) and myogenic amyotrophic disorders such as sarcopenia or disuse muscle atrophy. Provided is a therapeutic agent for amyotrophic diseases that comprises one or more compounds selected from the group consisting of compounds represented by the formula (I), the formula (II) and the formula (III), and pharmaceutically acceptable salts of the compounds when R3 represents OH.
    Type: Application
    Filed: June 24, 2016
    Publication date: February 21, 2019
    Inventors: Takaaki ABE, Masakuni HORIGUCHI, Yuji MATSUMOTO, Maiko NAGAYASU, Keiichi MURAKAMI