Document Type and Number:
Japanese Patent JPS51101145
Kind Code:
U
Application Number:
JP1987175U
Publication Date:
August 13, 1976
Filing Date:
February 13, 1975
Export Citation:
International Classes:
G03B19/18; G03B1/00; G03B31/00; (IPC1-7): G03B1/00; G03B31/00