Document Type and Number:
Japanese Patent JPS5320827
Kind Code:
B2
Application Number:
JP7299871A
Publication Date:
June 29, 1978
Filing Date:
September 21, 1971
Export Citation:
International Classes:
H01J23/30; H01J23/027; H01J23/24; H01J25/40; (IPC1-7): H01J23/24; H01J23/027