Document Type and Number:
Japanese Patent JPS5481737
Kind Code:
U
Application Number:
JP15462477U
Publication Date:
June 09, 1979
Filing Date:
November 17, 1977
Export Citation:
International Classes:
G03B21/43; G03B1/56; G03B1/58; (IPC1-7): G03B21/43; G03B1/58