Document Type and Number:
Japanese Patent JPS5194225
Kind Code:
A
Application Number:
JP1959975A
Publication Date:
August 18, 1976
Filing Date:
February 17, 1975
Export Citation:
International Classes:
G03B31/04; G03B31/00; G03B31/02; (IPC1-7): G03B31/00; G03B31/02