Document Type and Number:
Japanese Patent JPS5455257
Kind Code:
U
Application Number:
JP12903077U
Publication Date:
April 17, 1979
Filing Date:
September 26, 1977
Export Citation:
International Classes:
H01J37/248; H01J37/10; H01J37/141; H01J37/26; (IPC1-7): H01J37/10; H01J37/26