Document Type and Number:
Japanese Patent JPS5195847
Kind Code:
A
Application Number:
JP2110575A
Publication Date:
August 23, 1976
Filing Date:
February 19, 1975
Export Citation:
International Classes:
G03B19/18; G03B17/00; G03B31/00; (IPC1-7): G03B17/00; G03B31/00