Document Type and Number:
Japanese Patent JPS5540683
Kind Code:
Y2
Application Number:
JP14670074U
Publication Date:
September 22, 1980
Filing Date:
December 02, 1974
Export Citation:
International Classes:
H01J7/24; H01J23/00; H01J23/033; H01J25/50; (IPC1-7): H01J7/24; H01J23/033