Document Type and Number:
Japanese Patent JPS57142735
Kind Code:
U
Application Number:
JP2858181U
Publication Date:
September 07, 1982
Filing Date:
March 03, 1981
Export Citation:
International Classes:
G03B27/00; G03G15/00; G03G21/00; G03G21/02; G06C17/00; (IPC1-7): G03G15/00; G03B27/00; G06C17/00