Document Type and Number:
Japanese Patent JPS4970941
Kind Code:
U
Application Number:
JP11420472U
Publication Date:
June 20, 1974
Filing Date:
October 03, 1972
Export Citation:
International Classes:
H04R9/02; H04R9/06; H04R9/08; (IPC1-7): H04R9/02; H04R9/06; H04R9/08