Document Type and Number:
Japanese Patent JPS4987342
Kind Code:
U
Application Number:
JP13160472U
Publication Date:
July 29, 1974
Filing Date:
November 17, 1972
Export Citation:
International Classes:
G03B1/18; G03B1/00; G03B1/42; G03B23/00; (IPC1-7): G03B1/00