Document Type and Number:
Japanese Patent JPS52136543
Kind Code:
U
Application Number:
JP4498076U
Publication Date:
October 17, 1977
Filing Date:
April 10, 1976
Export Citation:
International Classes:
H01J23/04; H01J1/15; H01J25/50; (IPC1-7): H01J1/15; H01J25/50