Document Type and Number:
Japanese Patent JPS5312161
Kind Code:
B2
Application Number:
JP11140572A
Publication Date:
April 27, 1978
Filing Date:
November 07, 1972
Export Citation:
International Classes:
H04H20/28; H04H20/88; H04H60/04; H04H60/13; H04S1/00; H04H1/00; H04H5/00