Document Type and Number:
Japanese Patent JPS5731491
Kind Code:
Y2
Application Number:
JP3907274U
Publication Date:
July 10, 1982
Filing Date:
April 08, 1974
Export Citation:
International Classes:
H01J23/00; H01J23/027; H01J23/033; H01J23/12; H01J25/00; (IPC1-7): H01J23/033; H01J23/12