Document Type and Number:
Japanese Patent JPS4821584
Kind Code:
U
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Application Number:
JP6475371U
Publication Date:
March 12, 1973
Filing Date:
July 23, 1971
Export Citation:
International Classes:
H04M1/02; G08B25/00; G08B25/10; H04B7/26; H04B11/00; (IPC1-7): H04B11/00; G08B25/00
Domestic Patent References:
| JPS3728476Y1 |