Document Type and Number:
Japanese Patent JPH0449806
Kind Code:
Y2
Application Number:
JP4917485U
Publication Date:
November 24, 1992
Filing Date:
April 02, 1985
Export Citation:
International Classes:
H01J23/00; H01J7/24; H01J23/087; H01J23/12; (IPC1-7): H01J23/00; H01J23/12