Patents by Inventor Stephen M. Perrigo

Stephen M. Perrigo 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).

  • Low frequency speaker enclosure
    Patent number: 4592444
    Abstract: This invention relates to low-frequency speaker enclosures in general, and more specifically to dual cabinet construction, wherein each of the cabinet structures contains a portion of a pre-formed generally semi-circular variable diameter horn passageway, surrounded by contoured foam elements that provide sound insulation for the horn passageway wherein the pre-formed horn passageway produces redirection and amplification of rear-cone sound wave energy, through the forward face of the combined cabinet construction.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: June 3, 1986
    Inventor: Stephen M. Perrigo
  • Low frequency speaker enclosure
    Patent number: 4524845
    Abstract: This invention relates to low-frequency speaker enclosures in general, and more specifically to a dual cabinet construction, wherein each of the cabinet structures contains a portion of a generally semi-circular uniform diameter horn passageway, formed by contoured foam elements that provide redirection and amplification of rear-cone sound wave energy, through the forward face of the combined cabinet construction.
    Type: Grant
    Filed: February 28, 1983
    Date of Patent: June 25, 1985
    Inventor: Stephen M. Perrigo