Patents by Inventor Masamichi Yamada

Masamichi Yamada 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: 20220263448
    Abstract: There is provided a control device for an electric motor. The control device includes an inverter circuit and a control circuit. In a control cycle of the electric motor, the control cycle includes first to third sections. The control circuit outputs a first modulated wave in accordance with an output of the electric motor and outputs a minimum value or maximum value of a carrier wave as second and third modulated waves in the first section with a peak of first alternate-current voltage, and outputs the second modulated wave in accordance with an output of the electric motor and outputs the minimum value or maximum value of the carrier wave as the first and third modulated waves in the second section with a peak of second alternate-current voltage. The same output is applied in the third section with a peak of third alternate-current voltage.
    Type: Application
    Filed: June 22, 2020
    Publication date: August 18, 2022
    Applicant: KABUSHIKI KAISHA TOYOTA JIDOSHOKKI
    Inventors: Kazuki YAMANE, Nobuaki YAMADA, Masamichi NAWA
  • Publication number: 20220252838
    Abstract: A lens unit includes: a lens group including: an object-side lens closest to an object side in the lens group; an image-side lens closest to an image side in the lens group; and an intermediate lens between the object-side lens and the image-side lens, the object-side lens, the image-side lens, and the intermediate lens being arranged along an optical axis; a first holder holding an edge surface of the object-side lens and an edge surface of the intermediate lens; and a second holder separate from the first holder, the second holder holding the edge surface of the intermediate lens and an edge surface of the image-side lens.
    Type: Application
    Filed: January 31, 2022
    Publication date: August 11, 2022
    Inventors: Yoshifumi SUDOH, Yasuo KATANO, Shigenobu HIRANO, Masahiro ITOH, Naoki NAKAMURA, Susumu MOMMA, Shun OKAZAKI, Masamichi YAMADA, Kenji KAMEYAMA, Norikazu IGARASHI, Aino HASEGAWA, Takashi MAKI
  • Publication number: 20220105125
    Abstract: Provided is an agent for proving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Application
    Filed: October 25, 2021
    Publication date: April 7, 2022
    Applicant: SEIKAGAKU CORPORATION
    Inventors: Masamichi YAMADA, Chiyo SAKENAGA, Keiichiro ARAI, Kazutaka YAMAMOTO
  • Publication number: 20220026716
    Abstract: A propagation optical system includes: a first optical system; an intermediate optical element; and a second optical system. The first optical system, the intermediate optical element, and the second optical system being sequentially arranged in a direction from the image display element toward the light guide member along an optical axis. The intermediate optical element has a non-rotationally symmetric curved surface, of which shape is non-rotationally symmetric about the optical axis. A cross-sectional shape, of the non-rotationally symmetric curved surface, in a first plane including the optical axis is non-arc shape. The first plane is a plane in which the non-rotationally symmetric surface has a strongest positive power among planes including the optical axis. The propagation optical system is configured to form, between the first optical system and the second optical system, an intermediate image corresponding to an image displayed on the image display element.
    Type: Application
    Filed: July 19, 2021
    Publication date: January 27, 2022
    Inventors: Yoshifumi SUDOH, Naoki NAKAMURA, Masahiro ITOH, Susumu MOMMA, Shun OKAZAKI, Shigenobu HIRANO, Yasuo KATANO, Kenji KAMEYAMA, Norikazu IGARASHI, Aino HASEGAWA, Takashi MAKI, Masamichi YAMADA, Takemasa TSUTSUI
  • Patent number: 11185558
    Abstract: Provided is an agent for proving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: November 30, 2021
    Assignee: SEIKAGAKU CORPORATION
    Inventors: Masamichi Yamada, Chiyo Sakenaga, Keiichiro Arai, Kazutaka Yamamoto
  • Patent number: 11147831
    Abstract: Provided is an agent for proving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: October 19, 2021
    Assignee: SEIKAGAKU CORPORATION
    Inventors: Masamichi Yamada, Chiyo Sakenaga, Keiichiro Arai, Kazutaka Yamamoto
  • Publication number: 20210247018
    Abstract: A stand for suspending a display device includes a stand mechanism including supporting posts and a mounting plate connecting between the supporting posts; and a rotating unit configured to change orientation of the display device between a landscape orientation and a portrait orientation without detaching the display device, wherein the rotating unit includes a rotating unit fixed part fixed to the stand mechanism, and a rotating unit moving part fixed to a rear surface of the display device and configured to move together with the display device, wherein the rotating unit fixed part includes a fixing plate having two or more holes, a large spacer having two or more holes, and two or more small spacers each having one hole, and wherein the rotating unit moving part includes a sliding planar part having two or more holes.
    Type: Application
    Filed: February 4, 2021
    Publication date: August 12, 2021
    Inventor: Masamichi YAMADA
  • Publication number: 20210247015
    Abstract: A stand for supporting a display device includes multiple posts and a mounting plate module configured to connect the posts to each other. The stand is configured such that a rotary unit is attachable to and detachable from the mounting plate module, the display device is attachable to the mounting plate module via the rotary unit and is also attachable to the mounting plate module without the rotary unit, and a position of the display device relative to the stand in a depth direction in a state where the display device is attached to the mounting plate module via the rotary unit is the same as the position of the display device relative to the stand in the depth direction in a state where the display device is attached to the mounting plate module without the rotary unit.
    Type: Application
    Filed: February 2, 2021
    Publication date: August 12, 2021
    Applicant: Ricoh Company, Ltd.
    Inventor: Masamichi YAMADA
  • Publication number: 20200338113
    Abstract: Provided is an agent for proving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Application
    Filed: July 7, 2020
    Publication date: October 29, 2020
    Applicant: SEIKAGAKU CORPORATION
    Inventors: Masamichi YAMADA, Chiyo Sakenaga, Keiichiro Arai, Kazutaka Yamamoto
  • Publication number: 20200330503
    Abstract: Provided is an agent for proving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Application
    Filed: July 7, 2020
    Publication date: October 22, 2020
    Applicant: SEIKAGAKU CORPORATION
    Inventors: Masamichi Yamada, Chiyo Sakenaga, Keiichiro Arai, Kazutaka Yamamoto
  • Publication number: 20190302584
    Abstract: An image projection apparatus includes an image displayer on which an image is formed; an illuminator configured to illuminate the image displayer; and an optical projector configured to project the image formed on the image displayer. A plurality of spacers having different thicknesses from each other is disposed between the illuminator and the image displayer or between the illuminator and the optical projector. Each of the plurality of spacers having a different thickness is configured to have a greater thickness as a size is larger, or to have a greater thickness as the size is smaller, the size being a size of a surface perpendicular to a thickness direction of each of the plurality of spacers.
    Type: Application
    Filed: March 14, 2019
    Publication date: October 3, 2019
    Applicant: Ricoh Company, Ltd.
    Inventor: Masamichi YAMADA
  • Patent number: 10225531
    Abstract: An image display unit includes a first unit fixed to a receiving frame, a second unit, movably supported by the first unit, including an image generator to generate an image when light enters the image generator, and a first link unit to supportingly fix the first unit to the receiving frame, and a space between the first unit and the receiving frame adjustable by the first link unit.
    Type: Grant
    Filed: May 11, 2017
    Date of Patent: March 5, 2019
    Assignee: Ricoh Company, Ltd.
    Inventors: Masamichi Yamada, Yoshito Saito, Akihisa Mikawa
  • Patent number: 10197894
    Abstract: An image generation device includes an image generator, a stationary unit, a movable unit, and a dustproof unit. The image generator receives light and generate an image. The stationary unit includes a first stationary plate and a second stationary plate opposed to the first stationary plate. The movable unit includes a movable plate movably supported between the first stationary plate and the second stationary plate, the image generator mounted on the movable plate. The dustproof unit includes a dustproof member between the first stationary plate and the movable plate. The dustproof member surrounds the image generator.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: February 5, 2019
    Assignee: RICOH COMPANY, LTD.
    Inventor: Masamichi Yamada
  • Patent number: 10012893
    Abstract: An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.
    Type: Grant
    Filed: April 26, 2017
    Date of Patent: July 3, 2018
    Assignee: RICOH COMPANY, LTD.
    Inventors: Masamichi Yamada, Tetsuya Fujioka, Yasutada Tsukioka, Naoyuki Ishikawa, Hideo Kanai
  • Publication number: 20180157156
    Abstract: An image generation device includes an image generator, a stationary unit, a movable unit, and a dustproof unit. The image generator receives light and generate an image. The stationary unit includes a first stationary plate and a second stationary plate opposed to the first stationary plate. The movable unit includes a movable plate movably supported between the first stationary plate and the second stationary plate, the image generator mounted on the movable plate. The dustproof unit includes a dustproof member between the first stationary plate and the movable plate. The dustproof member surrounds the image generator.
    Type: Application
    Filed: November 28, 2017
    Publication date: June 7, 2018
    Applicant: Ricoh Company, Ltd.
    Inventor: Masamichi YAMADA
  • Publication number: 20170348347
    Abstract: Provided is an agent for improving human ocular subjective symptoms containing hyaluronic acid having an aminoalkyl cinnamate covalently bonded thereto.
    Type: Application
    Filed: December 25, 2015
    Publication date: December 7, 2017
    Applicant: Seikagaku Corporation
    Inventors: Masamichi Yamada, Chiyo Sakenaga, Keiichiro Arai
  • Publication number: 20170347070
    Abstract: An image display unit includes a first unit fixed to a receiving frame, a second unit, movably supported by the first unit, including an image generator to generate an image when light enters the image generator, and a first link unit to supportingly fix the first unit to the receiving frame, and a space between the first unit and the receiving frame adjustable by the first link unit.
    Type: Application
    Filed: May 11, 2017
    Publication date: November 30, 2017
    Inventors: Masamichi YAMADA, Yoshito SAITO, Akihisa MIKAWA
  • Publication number: 20170272718
    Abstract: A moving apparatus includes a fixed unit including a first fixed plate and a second fixed plate that are arranged to face each other; a driving unit including a first member and a second member that operate in pairs; and a movable unit including a first part and a second part, the first part is arranged inside the fixed unit. The second part is arranged outside the fixed unit. A center of gravity of the movable unit is outside the fixed unit. The first member is arranged on one of the first fixed plate and the second fixed plate. The center of gravity of the movable unit is closer to the one of the first fixed plate and the second fixed plate than the other of the first fixed plate and the second fixed plate. The second member is arranged on the second part to face the first member.
    Type: Application
    Filed: February 27, 2017
    Publication date: September 21, 2017
    Applicant: Ricoh Company, Ltd.
    Inventors: Akihisa MIKAWA, Masamichi YAMADA, Yoshito SAITO
  • Publication number: 20170227835
    Abstract: An image projection apparatus includes a light source, light from which is used to form an image to be projected, a first flow path, a control unit configured to control a light emission from the light source, an electrical power stabilizing unit configured to stabilize an electrical power to be supplied to the light source, and an electrical power source unit configured to supply the electrical power to at least one of the control unit and the electrical power stabilizing unit. One or both of the electrical power source unit and the electrical power stabilizing unit is/are divided into a plurality of boards. The light source is arranged on a normal line of a surface of any of the plurality of boards. The plurality of boards configure surfaces of the first flow path except a surface nearest to the light source.
    Type: Application
    Filed: April 26, 2017
    Publication date: August 10, 2017
    Applicant: RICOH COMPANY, LTD.
    Inventors: Masamichi YAMADA, Tetsuya FUJIOKA, Yasutada TSUKIOKA, Naoyuki ISHIKAWA, Hideo KANAI
  • Patent number: 9713282
    Abstract: A cooling apparatus including an air blow part including an air outtake port; and a heat dissipater including a plurality of heat dissipating fins, wherein an end side of an upper surface of the heat dissipater is linearly aligned, wherein the plurality of heat dissipating fins includes a first heat dissipating area and a second heat dissipating area, wherein a surface area of the heat dissipating fins arranged in the first heat dissipating area is smaller than a surface area of the heat dissipating fins arranged in the second heat dissipating area, wherein the heat dissipating fins are arranged at a position facing the air outtake port of the air blow part.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: July 18, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Akihisa Mikawa, Tetsuya Fujioka, Hideo Kanai, Masamichi Yamada, Yasunari Mikutsu, Satoshi Tsuchiya, Yukimi Nishi