73157286
Feb 2, 1978
Apr 29, 1980
TALKING APPARATUS COMPRISING A NON-MAGNETICALLY RECORDED TAPE IN THE FORM OF A GROOVED PLASTIC STRIP AND A SOUNDING BOARD IN THE FORM OF A VIBRATABLE CARD FOR THE PRODUCTION OF SOUND UPON SEQUENTIAL ENGAGEMENT OF THE RECORDED GROOVES BY A FINGERNAIL, NEEDLE, WIRE OR OTHER SUITABLE TOOL
Electrical and Scientific Apparatus