Document Type and Number:
Japanese Patent JPS4983953
Kind Code:
U
Application Number:
JP12805172U
Publication Date:
July 20, 1974
Filing Date:
November 08, 1972
Export Citation:
International Classes:
H01J31/20; H01J29/07; H01J31/46; (IPC1-7): H01J29/07; H01J31/46
Foreign References:
| US3005921A | 1961-10-24 |