Document Type and Number:
Japanese Patent JPS637044
Kind Code:
Y2
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Application Number:
JP1614584U
Publication Date:
February 29, 1988
Filing Date:
February 09, 1984
Export Citation:
International Classes:
H04R1/02; A43B13/38; A43B21/22; A43B23/02; A43B23/24; (IPC1-7): A43B23/24; A43B23/02
Next Patent: IDENTIFICATION SIGNAL TRANSMITTING/RECEIVING SYSTEM