Document Type and Number:
Japanese Patent JPS5033044
Kind Code:
U
Application Number:
JP8569073U
Publication Date:
April 10, 1975
Filing Date:
July 18, 1973
Export Citation:
International Classes:
G03B19/18; G03B23/00; G03B31/00; (IPC1-7): G03B31/00; G03B23/00