Patents by Inventor Tadafumi Ohguro

Tadafumi Ohguro 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).

  • Film feeding system of a camera
    Patent number: 4460256
    Abstract: A film advancing system of a camera in which a roll of film inside a film cartridge is first wound to a spool and then the film is rewound into the cartridge one frame from another after each photographic operation is provided. The system includes a reversibly rotatable motor the drivement and rotational direction of which are automatically controlled depending upon various conditions of the camera to implement required advancement of the film.
    Type: Grant
    Filed: November 20, 1981
    Date of Patent: July 17, 1984
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Araki, Susumu Iguchi, Tadafumi Ohguro, Yoshimi Ono, Koichi Nishi, Yoshio Fukushima, Satoshi Yamane, Hirofumi Horigome
  • Film feeding system of a camera
    Patent number: RE32850
    Abstract: A film advancing system of a camera in which a roll of film inside a film cartridge is first wound to a spool and then the film is rewound into the cartridge one frame from another after each photographic operation is provided. The system includes a reversibly rotatable motor the drivement and rotational direction of which are automatically controlled depending upon various conditions of the camera to implement required advancement of the film.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: January 31, 1989
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Araki, Susumu Iguchi, Tadafumi Ohguro, Yoshimi Ono, Koichi Nishi, Yoshio Fukushima, Satoshi Yamane, Hirofumi Horigome
  • Film feeding system of a camera
    Patent number: RE33436
    Abstract: A film advancing system of a camera in which a roll of film inside a film cartridge is first wound to a spool and then the film is rewound into the cartridge one frame from another after each photographic operation is provided. The system includes a reversibly rotatable motor the drivement and rotational direction of which are automatically controlled depending upon various conditions of the camera to implement required advancement of the film.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: November 13, 1990
    Assignee: Ricoh Company, Ltd.
    Inventors: Kunihiko Araki, Susumu Iguchi, Tadafumi Ohguro, Yoshimi Ono, Koichi Nishi, Yoshio Fukushima, Satoshi Yamane, Hirofumi Horigome