Document Type and Number:
Japanese Patent JPS5349400
Kind Code:
Y2
Application Number:
JP11716077U
Publication Date:
November 27, 1978
Filing Date:
September 02, 1977
Export Citation:
International Classes:
G03B21/43; G03B1/00; G03B31/00; (IPC1-7): G03B31/00; G03B1/00