Patent US 4804885A
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| Patent number | US 4804885A (click link for details and documents via Google Patents) |
|---|---|
| Title | X-ray attenuating ceramic materials |
| Inventors | Ronald O. Petersen, James L. McAlpin |
| Company | Tektronix Inc |
| Filing date | 1984-08-20 |
| Grant date | 1989-02-14 |
Cites:
| Patent | Title | Inventors | Assignee | Granted |
|---|---|---|---|---|
| Patent US 3207936A | Electron beam display device | William H Wilbanks • Robert H Johnson • Chan H Wang • Frank C Erzen | Tektronix Inc | 1965-09-21 |
| Patent US 4130775A | Charge image charge transfer cathode ray tube having a scan expansion electron lens system and collimation electrode means | Peter E. Perkins • Stephen F. Blazo | Tektronix Inc | 1978-12-19 |
| Patent US 4142128A | Box-shaped scan expansion lens for cathode ray tube | Conrad Odenthal | Tektronix Inc | 1979-02-27 |