Title:
WARNING DEVICE UTILIZING TELEPHONE SET
Document Type and Number:
Japanese Patent JPS5482198
Kind Code:
A
Inventors:
MATSUDO RIYOUJI
Application Number:
JP15018877A
Publication Date:
June 30, 1979
Filing Date:
December 14, 1977
Export Citation:
Assignee:
MATSUDO RIYOUJI
International Classes:
H04M1/21; G08B25/08; (IPC1-7): G08B25/02; H04M1/21
Domestic Patent References:
| JPS4512353Y1 | 1970-05-29 |