Document Type and Number:
Japanese Patent JPS5721252
Kind Code:
Y2
Application Number:
JP4064075U
Publication Date:
May 08, 1982
Filing Date:
March 25, 1975
Export Citation:
International Classes:
H01J23/10; H01J23/20; H01J25/50; H01J25/55; (IPC1-7): H01J23/10; H01J23/20; H01J25/25