Document Type and Number:
Japanese Patent JPS54143238
Kind Code:
U
Application Number:
JP1908879U
Publication Date:
October 04, 1979
Filing Date:
February 19, 1979
Export Citation:
International Classes:
G03B21/43; G03B1/00; G03B21/00; G03B23/02; (IPC1-7): G03B21/00; G03B23/02