72120365
May 19, 1961
Jul 23, 1963
LANGUAGE LABORATORIES, SUCH A LABORATORY COMPRISING A TEACHER CONSOLE IN WHICH IS HOUSED ELECTRONIC EQUIPMENT FOR RECORDING AND PLAYBACK, AND STUDENT BOOTHS IN WHICH IS HOUSED EQUIPMENT FOR SIGNAL RECEIVING AND TRANSMITTING ELECTRICALLY CONNECTED TO THE ELECTRONIC EQUIPMENT IN THE TEACHER CONSOLE, SUCH LABORATORIES BEING PRIMARILY INTENDED FOR USE IN SCHOOLS AS AN AID IN THE TEACHING OF FOREIGN LANGUAGES OR OTHER SUBJECTS
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