Document Type and Number:
Japanese Patent JPS57149480
Kind Code:
U
Application Number:
JP3610881U
Publication Date:
September 20, 1982
Filing Date:
March 14, 1981
Export Citation:
International Classes:
G04B19/10; G04B37/05; (IPC1-7): G04B19/10; G04B37/05
Domestic Patent References:
JP54043352B | ||||
JP53134973B |
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