Document Type and Number:
Japanese Patent JPS5246737
Kind Code:
Y2
Application Number:
JP12724473U
Publication Date:
October 24, 1977
Filing Date:
November 05, 1973
Export Citation:
International Classes:
G03B21/00; G03B17/00; G03B21/44; G03B23/00; (IPC1-7): G03B21/44; G03B23/00