Document Type and Number:
Japanese Patent JPS52155482
Kind Code:
U
Application Number:
JP6396676U
Publication Date:
November 25, 1977
Filing Date:
May 21, 1976
Export Citation:
International Classes:
G02B5/12; F21S8/10; F21V5/04; G09F13/16; (IPC1-7): F21Q1/00; G09F13/16