Document Type and Number:
Japanese Patent JPS5376830
Kind Code:
U
Application Number:
JP15851476U
Publication Date:
June 27, 1978
Filing Date:
November 29, 1976
Export Citation:
International Classes:
G03B7/087; G03B17/20; G03B19/12; (IPC1-7): G03B7/08; G03B17/20; G03B19/12