Patent US 3253144A
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| Patent number | US 3253144A (click link for details and documents via Google Patents) |
|---|---|
| Title | Electron lens having means for correcting astigmatism |
| Inventors | Gertrude F Rempfer |
| Company | Tektronix Inc |
| Filing date | 1963-05-27 |
| Grant date | 1966-05-24 |