Document Type and Number:
Japanese Patent JPS5432138
Kind Code:
U
Application Number:
JP10541677U
Publication Date:
March 02, 1979
Filing Date:
August 05, 1977
Export Citation:
International Classes:
G03B1/18; G03B1/00; G03B31/00; (IPC1-7): G03B31/00; G03B1/00