Document Type and Number:
Japanese Patent JPS525577
Kind Code:
Y2
Application Number:
JP5227371U
Publication Date:
February 04, 1977
Filing Date:
June 17, 1971
Export Citation:
International Classes:
H01J23/04; H01J1/15; H01J25/50; (IPC1-7): H01J1/15; H01J25/50