Document Type and Number:
Japanese Patent JPS4932218
Kind Code:
Y1
Application Number:
JP3120570U
Publication Date:
August 30, 1974
Filing Date:
April 01, 1970
Export Citation:
International Classes:
H04R1/02; A63H13/20; A63H17/32; A63H19/14; (IPC1-7): A63H19/14; A63H13/20; H04R1/02