Document Type and Number:
Japanese Patent JPS5040225
Kind Code:
U
Application Number:
JP9049973U
Publication Date:
April 24, 1975
Filing Date:
July 31, 1973
Export Citation:
International Classes:
G03B21/132; G02B3/08; G03B21/14; G03B21/20; (IPC1-7): G03B21/132; G02B3/08