Patents by Inventor Louis J. Barbara

Louis J. Barbara 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).

  • Sound recording system
    Patent number: 4141344
    Abstract: In recording an audio program, such as music or voice, on a magnetic tape recorder an A.C. signal generator operating at a frequency below about 14 Hz. provides an A.C. baseline for the audio program signal. This 14 Hz. or lower A.C. signal is sensed by the listener's ear to create an Alpha or Theta state in his brain when the tape is played back.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: February 27, 1979
    Inventor: Louis J. Barbara