Document Type and Number:
Japanese Patent JPS55118206
Kind Code:
U
Application Number:
JP1810179U
Publication Date:
August 21, 1980
Filing Date:
February 14, 1979
Export Citation:
International Classes:
G02B6/293; G02B6/28; G02B27/10; G02B27/42; (IPC1-7): G02B5/14; G02B27/10