Document Type and Number:
Japanese Patent JPS4987341
Kind Code:
U
Application Number:
JP13318372U
Publication Date:
July 29, 1974
Filing Date:
November 18, 1972
Export Citation:
International Classes:
G03B27/32; G03B27/58; G03B27/62; G03G15/04; (IPC1-7): G03B27/58