73659197
May 6, 1987
Dec 22, 1987
APPARATUS COMPRISING A NON-MAGNETICALLY RECORDED TAPE IN THE FORM OF A GROOVED PLASTIC STRIP AND A SOUNDING BOARD 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