Patents by Inventor Yasuhiko Amagasa

Yasuhiko Amagasa 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).

  • Portable refractometer
    Patent number: 7369221
    Abstract: A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube shaped optical chassis is inside the lens barrel, and is rotatably supported about a predetermined rotational axis perpendicular to the lens barrel axis. An objective lens is arranged in the optical chassis, and is positioned in relation to the optical chassis. An optical scale is arranged inside the optical chassis, at the focal point of the objective lens. A mover moves the objective lens relatively in relation to the optical scale in response to changes in temperature by turning the optical chassis about the rotational axis.
    Type: Grant
    Filed: January 17, 2006
    Date of Patent: May 6, 2008
    Assignee: Atago Co., Ltd.
    Inventors: Hideyuki Amamiya, Yasuhiko Amagasa, Takeshi Kubodera, Mitsuru Murata
  • Portable refractometer
    Publication number: 20060164629
    Abstract: A portable refractometer is provided that includes a lens barrel having a lens barrel axis. A prism is secured to one end of the lens barrel, the prism having an entry face that provides a boundary surface between the prism and a substance to be measured. A tube shaped optical chassis is inside the lens barrel, and is rotatably supported about a predetermined rotational axis perpendicular to the lens barrel axis. An objective lens is arranged in the optical chassis, and is positioned in relation to the optical chassis. An optical scale is arranged inside the optical chassis, at the focal point of the objective lens. A mover moves the objective lens relatively in relation to the optical scale in response to changes in temperature by turning the optical chassis about the rotational axis.
    Type: Application
    Filed: January 17, 2006
    Publication date: July 27, 2006
    Applicant: ATAGO CO., LTD.
    Inventors: Hideyuki Amamiya, Yasuhiko Amagasa, Takeshi Kubodera, Mitsuru Murata
  • Refractometer
    Patent number: D554549
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: November 6, 2007
    Assignee: ATAGO Co, Ltd.
    Inventors: Hideyuki Amamiya, Yasuhiko Amagasa, Takeshi Kubodera