Document Type and Number:
Japanese Patent JPS50159736
Kind Code:
A
Application Number:
JP6743774A
Publication Date:
December 24, 1975
Filing Date:
June 13, 1974
Export Citation:
International Classes:
G03B19/18; G03B17/18; G03B31/02; (IPC1-7): G03B17/18; G03B31/02