Document Type and Number:
Japanese Patent JPH0446347
Kind Code:
U
Application Number:
JP8874090U
Publication Date:
April 20, 1992
Filing Date:
August 24, 1990
Export Citation:
International Classes:
H01J37/20; H01J37/18; (IPC1-7): H01J37/18; H01J37/20
Next Patent: JPH0446348