Document Type and Number:
Japanese Patent JPS51138063
Kind Code:
U
Application Number:
JP5905275U
Publication Date:
November 08, 1976
Filing Date:
April 30, 1975
Export Citation:
International Classes:
H01J7/18; H01J23/00; (IPC1-7): H01J23/00; H01J7/18
Domestic Patent References:
| JPS4830859A | 1973-04-23 |
Foreign References:
| US3173048A | 1965-03-09 |