Document Type and Number:
Japanese Patent JPS55134696
Kind Code:
U
Application Number:
JP3534379U
Publication Date:
September 25, 1980
Filing Date:
March 19, 1979
Export Citation:
International Classes:
H04M11/04; G08B19/00; G08B25/00; G08B25/10; (IPC1-7): G08B19/00; G08B25/00; H04M11/04