Document Type and Number:
Japanese Patent JPS57155871
Kind Code:
U
Application Number:
JP4268181U
Publication Date:
September 30, 1982
Filing Date:
March 26, 1981
Export Citation:
International Classes:
G03B27/34; G03G15/04; G03G15/043; G03G21/00; H04N1/04; H04N1/393; (IPC1-7): H04N1/04; G03G15/04