Patents by Inventor Jyoji Hukuda

Jyoji Hukuda 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).

  • Fluid flow control speaker system
    Patent number: 4194095
    Abstract: A fluid flow control system has a fluid source and plural flow pipes connected to the fluid source. Each of the pipes has an opening of a specific area corresponding to one of the bit orders of a PCM (Pulse Code Modulated) input signal. The flow-condition of the fluid through each of the pipes is controlled by the PCM signal without changing the PCM signal to an analog signal. The summation of the outflow from each of the pipes combines to produce an analog flow output signal in response to the PCM input signal.
    Type: Grant
    Filed: January 6, 1978
    Date of Patent: March 18, 1980
    Assignee: Sony Corporation
    Inventors: Toshitada Doi, Akira Iga, Osamu Hamada, Jyoji Hukuda, Yuichiro Hamada