Electron discharge device
United States Patent 2894167
Publication Date:
07/07/1959
Other Classes:
313/346R, 313/235, 445/33, 313/541
International Classes:
H01J21/02; H01J40/16; H01J21/00; H01J40/00
US Patent References:
| 2290748 | Vacuum tube and method of manufacture thereof | | | |
| 2601024 | Electrode structure for electron discharge devices | | | |