Patents by Inventor Louis Erath

Louis Erath 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).

  • Feedback System for a Multiple Element Loudspeaker
    Publication number: 20070269055
    Abstract: A control circuit enhances the frequency response of a loudspeaker. Separate control circuits are provided to control the frequency response of various ranges of the frequencies in the audible spectrum.
    Type: Application
    Filed: May 17, 2006
    Publication date: November 22, 2007
    Inventor: Louis Erath
  • Hydrophone carrier
    Patent number: 6188646
    Abstract: A hydrophone streamer including a central member running substantially the length of the streamer with a strength member and a plurality of conductors has formed therein space adapted to receive a plurality of a spaced apart pairs of collars, a cylindrical chamber wall between each of the pairs of collars defining a chamber, and one or more hydrophones within the chamber. The chamber wall has one or more opening through it for the free passage of sea water into the chamber, thereby shielding the hydrophones from extraneous noise while exposing the hydrophones to a seismic signal conducted by the sea water surrounding the streamer.
    Type: Grant
    Filed: March 29, 1999
    Date of Patent: February 13, 2001
    Assignee: Syntron, Inc.
    Inventors: John Luscombe, Louis Erath, Jim Spackman, David Lamance, Michael Maples, Gary Craig