Document Type and Number:
Japanese Patent JPS54166841
Kind Code:
U
Application Number:
JP6461278U
Publication Date:
November 24, 1979
Filing Date:
May 16, 1978
Export Citation:
International Classes:
G03B23/00; G02B27/02; G03B35/00; G03B35/18; (IPC1-7): G02B27/02; G03B23/00; G03B35/00