Patents by Inventor Chitoshi Shiraga

Chitoshi Shiraga 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).

  • Horn speaker
    Patent number: 4091891
    Abstract: A horn speaker comprising a diaphragm positioned close to a throat and side walls forming sound passages for radiating the vibrations of the diaphragm effectively as sound waves from the mouth of the speaker.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: May 30, 1978
    Assignee: Onkyo Kabushiki Kaisha
    Inventors: Masanori Hino, Taro Eguchi, Chitoshi Shiraga
  • Horn speaker
    Patent number: 4040503
    Abstract: A horn speaker comprising a diaphragm positioned close to a throat and side walls forming sound passages for radiating the vibrations of the diaphragm effectively as sound waves from the mouth of the speaker.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: August 9, 1977
    Assignee: Onkyo Kabushiki Kaisha
    Inventors: Masanori Hino, Taro Eguchi, Chitoshi Shiraga
  • Horn speaker
    Patent number: 3972385
    Abstract: A horn speaker comprising a diaphragm positioned close to a throat and side walls forming sound passages for radiating the vibrations of the diaphragm effectively as sound waves from the mouth of the speaker.
    Type: Grant
    Filed: January 14, 1974
    Date of Patent: August 3, 1976
    Assignee: Onkyo Kabushiki Kaisha
    Inventors: Masanori Hino, Taro Eguchi, Chitoshi Shiraga