Document Type and Number:
Japanese Patent JPS5319793
Kind Code:
Y2
Application Number:
JP12510373U
Publication Date:
May 25, 1978
Filing Date:
October 29, 1973
Export Citation:
International Classes:
G03B7/099; G03B7/0997; G03B13/02; G03B19/12; (IPC1-7): G03B7/00; G03B19/12