Patent US 4977348A
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| Patent number | US 4977348A (click link for details and documents via Google Patents) |
|---|---|
| Title | Electron discharge tube with bipotential electrode structure |
| Inventors | Conrad Odenthal |
| Company | Tektronix Inc |
| Filing date | 1989-03-07 |
| Grant date | 1990-12-11 |