Patents by Inventor Jean Albert Dreyfus

Jean Albert Dreyfus 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).

  • Speech recognition device for controlling a machine
    Patent number: 3946157
    Abstract: In an apparatus for speech recognition, intended for controlling machines, spoken words are synthesized from two to twelve phoneme classes. Phonemes are recognized by analysis of speech sounds, measuring and comparing energy and time-rate of change of energy in certain frequency bands. Words are recognized by further logic means analyzing phoneme classes.One particular feature determines the plosive class "T" versus the fricative class "S" by measuring energy rise-time.
    Type: Grant
    Filed: August 9, 1974
    Date of Patent: March 23, 1976
    Inventor: Jean Albert Dreyfus