Document Type and Number:
Japanese Patent JPS5147006
Kind Code:
Y2
Application Number:
JP13360673U
Publication Date:
November 12, 1976
Filing Date:
November 19, 1973
Export Citation:
International Classes:
G03B19/18; G03B1/04; G03B21/32; G03B23/02; (IPC1-7): G03B23/02