Patents by Inventor Koji Yukawa

Koji Yukawa 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).

  • Heterocyclic compounds having a calcium-sensing receptor antagonistic activity
    Patent number: 12202832
    Abstract: The present invention provides a compound or a salt thereof having a calcium-sensing receptor antagonistic activity, and being expected to be useful as an agent for preventing or treating heart failure, pulmonary hypertension, or the like. The compounds represented by formula (I) or a salt thereof has a calcium-sensing receptor antagonistic activity, and is expected to be useful as an agent for preventing or treating heart failure, pulmonary hypertension, or the like, wherein each symbol is as described in the specification.
    Type: Grant
    Filed: April 26, 2018
    Date of Patent: January 21, 2025
    Assignee: TAKEDA PHARMACEUTICAL COMPANY LIMITED
    Inventors: Shuji Kitamura, Zenichi Ikeda, Minoru Ikoma, Koji Watanabe, Hideki Hirose, Takafumi Yukawa, Sachie Morimoto, Naoki Nishizawa, Taiji Asami
  • An improved platen cover for a copying machine
    Patent number: 4415261
    Abstract: An improved platen cover for overlying original documents disposed atop a transparent plate for optical scanning in a copying machine includes marks or patterns on its surface facing the transparent plate. The marks or patterns are placed on the platen cover surface utilizing a fluorescent paint so that the marks or patterns do not reproduce on or degrade the quality of the copy of the original document operatively produced by the machine.
    Type: Grant
    Filed: September 15, 1981
    Date of Patent: November 15, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Koji Yukawa, Takashi Murahashi, Isao Sakurai
  • Copying machine having detectors for the background color and density of the original
    Patent number: 4372674
    Abstract: An apparatus for facilitating creation of an improved quality reproduction of an original to be copied includes a first sensor for producing a signal in accordance with the density of the background or nonimage are of the original, a second sensor for producing a signal in accordance with the color of its background, and electronic circuit means for generating a bias voltage based on the sensed density and color of the background of the original for application to a developing apparatus.
    Type: Grant
    Filed: October 27, 1980
    Date of Patent: February 8, 1983
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Koji Yukawa, Masayuki Miyazaki, Takashi Murahashi
  • Device for detecting the size of the material to be copied in copying machines
    Patent number: 4338020
    Abstract: A device for determining the size of an original or material to be copied in the copying machine wherein a color sensor is used as means for detecting the size of the original. The device comprising a colored member having a certain color, a light emitting member for throwing light upon the colored member, and a light receiving member for receiving light reflected by or transmitted through the colored member.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: July 6, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Koji Yukawa, Masayuki Miyazaki, Takashi Murahashi