Patents by Inventor Shouzo Kinoshita

Shouzo Kinoshita 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).

  • Loudspeaker with rigid foamed back-cavity
    Patent number: 4127751
    Abstract: The rear cavity of a tweeter speaker includes a cylindrical block four of a rigid, open celled, homogenous foamed material, such as aluminum. The rear end of the cylinder is cut to expose open cells, and is coated with an impermeable resin film, whereby the block absorbs and dampens back-pressure vibrations within the speaker cabinet from the low frequency woofer, and reduces standing and reflected waves generated by the tweeter. Alternatively, the entire block may be enclosed within a case five.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: November 28, 1978
    Assignee: Pioneer Electronic Corporation
    Inventor: Shouzo Kinoshita
  • Speaker cabinet
    Patent number: 4109983
    Abstract: A speaker cabinet is constituted with plate material formed by intimately bonding a rigid foam plate having communicating or open-cell bubbles to a surface plate material with the latter being outside.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: August 29, 1978
    Assignee: Pioneer Electronic Corporation
    Inventor: Shouzo Kinoshita
  • Piezoelectric acoustic speaker system
    Patent number: 3978353
    Abstract: A Piezoelectric speaker system with a piezoelectric diaphragm supported in a cylindrical form and provided with a plurality of vibration regions, which is capable of controlling the directional characteristics by easy operation according to necessity or listener's preference.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: August 31, 1976
    Assignee: Pioneer Electronic Corporation
    Inventor: Shouzo Kinoshita