Document Type and Number:
Japanese Patent JPS5543646
Kind Code:
Y2
Application Number:
JP17042875U
Publication Date:
October 14, 1980
Filing Date:
December 16, 1975
Export Citation:
International Classes:
H01J23/04; H01J1/15; H01J1/18; H01J7/18; (IPC1-7): H01J1/15; H01J7/18; H01J23/04