Patents by Inventor Armand Dancer

Armand Dancer 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).

  • Acoustic valve capable of selective and non-linear filtering of sound
    Patent number: 6068079
    Abstract: Acoustic valve capable of selective and non-linear filtering of sound and placeable in a perforated ear plug. The acoustic valve consists of a tube enclosing two rigid disks axially spaced opposite each other, each of the disks containing at least one perforation. The total perforated surface of at least one disk is between 0.03 and 0.5 mm.sup.2.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: May 30, 2000
    Assignee: I.S.L. Institut Franco-Allemand de Recherches de Saint-Louis
    Inventors: Pascal Hamery, Armand Dancer, Georges Evrard