Document Type and Number:
Japanese Patent JPS5628681
Kind Code:
Y2
Application Number:
JP3843972U
Publication Date:
July 08, 1981
Filing Date:
April 03, 1972
Export Citation:
International Classes:
H01J40/02; H01J40/08; H01J43/18; H01J43/20; (IPC1-7): H01J43/18; H01J40/08