Document Type and Number:
Japanese Patent JPS4878101
Kind Code:
U
Application Number:
JP171072U
Publication Date:
September 26, 1973
Filing Date:
December 27, 1971
Export Citation:
International Classes:
G03B31/06; G03B31/00; H04R5/00; H04S7/00; (IPC1-7): H04R5/00; G03B31/00