Patents by Inventor Hiroshi Zyo

Hiroshi Zyo 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).

  • Loud-speaker
    Patent number: 4437540
    Abstract: A loud-speaker of a closed or a bass-reflex type, wherein a plurality of speaker units are intensively arranged behind an opening of a baffle board or a throat of a sounding horn with the sound wave radiating direction thereof being concentrated toward the center axis of the opening of throat, and the total area of the entire diaphragms of the speaker units is made substantially equal to, or larger than, the area of the opening or throat.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: March 20, 1984
    Assignee: Naoyuki Murakami
    Inventors: Naoyuki Murakami, Hiroshi Zyo
  • Loud-speaker
    Patent number: 4391346
    Abstract: A loud-speaker of a closed or a bass-reflex type, wherein a plurality of speaker units are intensively arranged behind an opening of a baffle board or a throat of a sounding horn with the sound wave radiating direction thereof being concentrated toward the center axis of the opening of throat, and the total area of the entire diaphragms of the speaker units is made substantially equal to, or larger than, the area of the opening or throat.
    Type: Grant
    Filed: September 30, 1980
    Date of Patent: July 5, 1983
    Assignee: Naoyuki Murakami
    Inventors: Naoyuki Murakami, Hiroshi Zyo