Document Type and Number:
Japanese Patent JPS5548187
Kind Code:
U
Application Number:
JP13214578U
Publication Date:
March 29, 1980
Filing Date:
September 25, 1978
Export Citation:
International Classes:
G03B19/18; G03B17/26; G03B17/34; G03B23/02; (IPC1-7): G03B19/18; G03B17/34; G03B23/02