Patents by Inventor Yutaka Udagawa

Yutaka Udagawa 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).

  • Multiple image forming apparatus
    Patent number: 4931815
    Abstract: There is disclosed an image forming apparatus for overlaying plural images in succession, in which a downstream image overlay is controlled in timing by an upstream image overlay, in order to avoid positional aberrations in the superposed multiple images.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: June 5, 1990
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukio Sato, Masafumi Wataya, Hiroaki Ishii, Yutaka Udagawa
  • Recording apparatus having controllable recording beam states
    Patent number: 4821065
    Abstract: A recording apparatus such as a laser beam printer has a plurality of photosensitive drums and a plurality of laser beam emitting means associated with the respective photosensitive drums and adapted for forming latent images on the respective photosensitive drums. Controlling means are provided for controlling the laser beam emitting power of the respective beam emitting means, in accordance with the result of a determination as to whether the potential of the surface of at least one of the photosensitive drums is at a normal level or whether the laser beam emitting means is at a predetermined level.
    Type: Grant
    Filed: December 24, 1986
    Date of Patent: April 11, 1989
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroaki Ishii, Yukio Sato, Yutaka Udagawa, Masafumi Wataya
  • Image recording apparatus
    Patent number: 4794413
    Abstract: An electrophotographic printer in which the data of the surface condition of photosensitive drum are stored in a memory in advance and are read at image recording for correcting an irregularity in the surface condition of the photosensitive drum.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: December 27, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Koji Yamazaki, Shigenori Ueda, Toshiyuki Ehara, Yutaka Udagawa
  • Pushbutton switch
    Patent number: 4207448
    Abstract: A pushbutton switch is disclosed which comprises a dome-shaped buckling plate spring between a fixed contact on a printed circuit board and a common conductive sheet. The curvature of the plate spring is reversed so as to obtain an electrical communication.
    Type: Grant
    Filed: June 22, 1978
    Date of Patent: June 10, 1980
    Assignee: Oki Electric Industry Co., Ltd.
    Inventors: Akira Furusawa, Yutaka Udagawa