Patent US 4789791A
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| Patent number | US 4789791A (click link for details and documents via Google Patents) |
|---|---|
| Title | Rotary drive mechanism |
| Inventors | Heinz Erwin Grellmann |
| Company | Tektronix Inc |
| Filing date | 1986-09-26 |
| Grant date | 1988-12-06 |