Patents Assigned to Davis, Van Nortwick & Company
  • Speech pattern correction device for deaf and voice-impaired
    Patent number: 5146502
    Abstract: A portable voice or speech aid enabling a deaf or voice impaired user to make sounds into a microphone to output intelligible speech through a built-in speaker or to a text display screen.
    Type: Grant
    Filed: February 26, 1990
    Date of Patent: September 8, 1992
    Assignee: Davis, Van Nortwick & Company
    Inventor: Stephen A. Davis