Document Type and Number:
Japanese Patent JPS5778495
Kind Code:
U
Application Number:
JP6191181U
Publication Date:
May 14, 1982
Filing Date:
April 28, 1981
Export Citation:
International Classes:
H04M11/04; G08B23/00; G08B25/00; G08B25/08; (IPC1-7): G08B25/00; G08B23/00; H04M11/04
Domestic Patent References:
| JPS501999A | 1975-01-10 |