Document Type and Number:
Japanese Patent JPS5552608
Kind Code:
Y2
Application Number:
JP3077774U
Publication Date:
December 06, 1980
Filing Date:
March 14, 1974
Export Citation:
International Classes:
H01J7/24; H01J23/00; H01J23/033; H01J25/50; (IPC1-7): H01J23/033