Document Type and Number:
Japanese Patent JPS4892932
Kind Code:
U
Application Number:
JP1632272U
Publication Date:
November 07, 1973
Filing Date:
February 10, 1972
Export Citation:
International Classes:
G03B27/70; G02B5/08; G03B21/00; G03B21/134; G03B21/28; (IPC1-7): G03B21/28