Document Type and Number:
Japanese Patent JPS5539386
Kind Code:
Y2
Application Number:
JP9641075U
Publication Date:
September 13, 1980
Filing Date:
July 10, 1975
Export Citation:
International Classes:
G03B21/64; G03B17/18; G03B21/00; G03B23/00; (IPC1-7): G03B23/00; G03B17/18; G03B21/00; G03B21/64