Document Type and Number:
Japanese Patent JPS5222197
Kind Code:
Y2
Application Number:
JP2208671U
Publication Date:
May 21, 1977
Filing Date:
March 30, 1971
Export Citation:
International Classes:
H01J7/24; H01J23/00; H01J25/50; (IPC1-7): H01J7/24; H01J25/50