Document Type and Number:
Japanese Patent JPS56120661
Kind Code:
U
Application Number:
JP1838280U
Publication Date:
September 14, 1981
Filing Date:
February 18, 1980
Export Citation:
International Classes:
H01J37/141; H01J7/24; H01J37/15; H01J37/18; H01J37/24; (IPC1-7): H01J37/18; H01J7/24; H01J37/141; H01J37/24