Patent US 4131821A
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| Patent number | US 4131821A (click link for details and documents via Google Patents) |
|---|---|
| Title | Aging resistant mixtures in bistable storage tubes |
| Inventors | Ralph A. Mossman |
| Company | Tektronix Inc |
| Filing date | 1977-09-06 |
| Grant date | 1978-12-26 |