Document Type and Number:
Japanese Patent JPS5289137
Kind Code:
U
Application Number:
JP17760275U
Publication Date:
July 04, 1977
Filing Date:
December 26, 1975
Export Citation:
International Classes:
G02B26/10; G02B27/02; G06K9/00; G06K9/20; (IPC1-7): G02B27/02; G06K9/00