Document Type and Number:
Japanese Patent JPS57108193
Kind Code:
U
Application Number:
JP18610380U
Publication Date:
July 03, 1982
Filing Date:
December 23, 1980
Export Citation:
International Classes:
G04B37/00; G04G21/08; G04G99/00; H01H36/00; (IPC1-7): G04G1/00; G04B37/00; H01H36/00