Document Type and Number:
Japanese Patent JPS5069938
Kind Code:
U
Application Number:
JP12593773U
Publication Date:
June 20, 1975
Filing Date:
October 31, 1973
Export Citation:
International Classes:
H04R7/20; H04R17/00; H04R19/00; (IPC1-7): H04R19/00; H04R7/20