Patents by Inventor Masao Taki

Masao Taki 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).

  • Sound attenuating system
    Patent number: 5347585
    Abstract: A sound attenuating system for attenuating sound from a sound source. The system comprises a main conduit through which the sound from the sound source propagates; a first device for defining in the conduit at least one passive acoustic reflecting surface; and a second device for defining in the conduit a plurality of active acoustic reflecting surfaces. The active acoustic reflecting surfaces are of a type which permits a partial permeation of sound therethrough.
    Type: Grant
    Filed: September 10, 1991
    Date of Patent: September 13, 1994
    Assignees: Calsonic Corporation, Nishiwaki Laboratory
    Inventors: Masao Taki, Takuji Mori, Shuntaro Murakami
  • Acoustic conductance and silencer utilizing same
    Patent number: 5257316
    Abstract: An acoustic conductance is formed with oscillatory planes parallel to a duct and disposed on an identical circumference of the duct along a plane intersecting at right angles the duct so that the total area of the oscillatory planes will be substantially more than twice as large as a sectional area of the duct. The acoustic conductance is thereby made less affective on a fluid and provides a pertinent disposition of the acoustic conductance.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: October 26, 1993
    Assignees: Matsushita Electric Works, Ltd., Nishiwaki Laboratory
    Inventors: Hiroaki Takeyama, Masao Taki, Takuji Mori