Document Type and Number:
Japanese Patent JPS50151147
Kind Code:
U
Application Number:
JP6311074U
Publication Date:
December 16, 1975
Filing Date:
June 03, 1974
Export Citation:
International Classes:
H01J31/20; H01J29/02; H01J29/07; (IPC1-7): H01J29/02; H01J29/07
Foreign References:
| US3553517A | 1971-01-05 | |||
| US2951167A | 1960-08-30 |