Document Type and Number:
Japanese Patent JPS5255356
Kind Code:
U
Application Number:
JP14216675U
Publication Date:
April 21, 1977
Filing Date:
October 17, 1975
Export Citation:
International Classes:
G09B19/00; G02B3/00; G02B3/08; G09B19/14; G09F13/16; (IPC1-7): G09B19/14; B62J5/20; G02B3/00