Document Type and Number:
Japanese Patent JPS5237944
Kind Code:
U
Application Number:
JP12406875U
Publication Date:
March 17, 1977
Filing Date:
September 09, 1975
Export Citation:
International Classes:
G02B7/00; G02B7/18; G02B7/182; G02B27/00; (IPC1-7): G02B7/18; G02B27/00