Document Type and Number:
Japanese Patent JPS5492736
Kind Code:
U
Application Number:
JP16789777U
Publication Date:
June 30, 1979
Filing Date:
December 14, 1977
Export Citation:
International Classes:
G03B7/16; G03B15/03; G03B15/05; G03B17/18; (IPC1-7): G03B15/05; G03B7/16; G03B17/18