US PATENT SUBCLASS 434 / 185
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EDUCATION AND DEMONSTRATION
(under subclass 156) Subject matter relating to instruction in proper speech, including public speaking and corrective training for persons with speech impediments.
SEE OR SEARCH CLASS
590, for a diagnostic device placed in a person's mouth to detect the locations where a person's tongue touches the palate during speech in order to determine abnormal speech patterns.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,
200+, for speech signal processing.