Document Type and Number:
Japanese Patent JPS5224498
Kind Code:
Y2
Application Number:
JP2326973U
Publication Date:
June 03, 1977
Filing Date:
February 24, 1973
Export Citation:
International Classes:
G03B19/18; G03B1/00; G03B21/50; G03B31/00; G03B31/04; (IPC1-7): G03B1/00; G03B31/00