Patent US 5142617A
Patent number | US 5142617A (click link for details and documents via Google Patents) |
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Title | Method of shading a graphics image |
Inventors | John C. Dalrymple, V. B. Sureshkumar |
Company | Tektronix Inc |
Filing date | 1988-10-27 |
Grant date | 1992-08-25 |