Document Type and Number:
Japanese Patent JPS55138851
Kind Code:
U
Application Number:
JP3849479U
Publication Date:
October 03, 1980
Filing Date:
March 23, 1979
Export Citation:
International Classes:
G08B3/10; G08B25/00; G08B27/00; H04H20/00; H04H20/10; H04H20/59; H04H20/61; H04H20/83; (IPC1-7): H04H1/02; G08B3/10; G08B27/00