Patents by Inventor Hirofumi Yoshiyama

Hirofumi Yoshiyama 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).

  • Data communication equipment
    Patent number: 4773080
    Abstract: A data communication equipment has a data communication device, a speech communication device, a selection device for selecting the data communication device or the speech communication device to set the data communication equipment in a data communication mode or a speech communication mode, a detection device for detecting non-data communication mode of a partner station when the data communication equipment is set in the data communication mode, and an output device for outputting a sound on the basis of a sound signal through the communication line.
    Type: Grant
    Filed: April 18, 1985
    Date of Patent: September 20, 1988
    Assignee: Canon Kabushiki Kaisha
    Inventors: Toshifumi Nakajima, Hirofumi Yoshiyama, Hisao Terajima