73138066
Aug 18, 1977
Aug 28, 1979
TRETIAKOFF ANDREE
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CASSETTE TAPE RECORDER/PLAYER/CALCULATOR COMBINATION-NAMELY, A UNIT WHICH TRANSLATES DIGITALLY-RECORDED AUDIO CASSETTE OR CALCULATOR INPUT INTO BRAILLE READER OUTPUT
PROSTHETIC DEVICES-NAMELY, ARTIFICIAL LIMBS, EYES AND TEETH