Patents by Inventor Lars Stahl

Lars Stahl 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).

  • Device for generating sound
    Patent number: 6188313
    Abstract: A device for regenerating powerful acoustic pressure comprises at least an arrangement for generating sound while utilizing the flextensional technique, i.e. having at least one surface element (2), the opposite ends (4, 5) of which are arranged to be influenced to oscillate away from and towards each other, and the surface element oscillating transversely thereto and generating sound.
    Type: Grant
    Filed: October 13, 1999
    Date of Patent: February 13, 2001
    Assignee: Åm System AB
    Inventor: Lars Stahl
  • Surface element and a device for generating sound
    Patent number: 5706254
    Abstract: A surface element for a device for generating sounds by influencing opposite extremities of a surface element to oscillate from and towards each other and thereby the surface element to oscillate transversely thereto and generate sounds has at least a portion formed in the thickness direction thereof by at least two first layers (12) and an intermediate layer (13) having a lower average density than the density of the two first layers.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: January 6, 1998
    Inventor: Lars Stahl