Document Type and Number:
Japanese Patent JPH0276461
Kind Code:
U
Application Number:
JP15680888U
Publication Date:
June 12, 1990
Filing Date:
November 30, 1988
Export Citation:
International Classes:
H01J29/94; H01J7/18; (IPC1-7): H01J29/94; H01J7/18
Next Patent: JPH0276462