Patents by Inventor Yukimasa Kawakita

Yukimasa Kawakita 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: 4106038
    Abstract: In the disclosed single lens reflex camera a focusing screen presents exposure information in addition to an image of the scene to be photographed. The image area of the screen is surrounded by walls protruding upward from and integral with the screen to prevent dust from entering the image area and to space the viewfinder lens from the screen in a dust tight manner along all or most of the periphery. Also disclosed is a pointer in a second area adjacent to one wall outside the image area which indicates information on a scale or a sliding plate.A fresnel lens, angled edge, or other means formed on the upper and/or lower side of the screen directs light to both the image area and the second area.
    Type: Grant
    Filed: May 24, 1976
    Date of Patent: August 8, 1978
    Assignee: Canon Kabushiki Kaisha
    Inventors: Yukimasa Kawakita, Youichi Okuno