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Patent:US3461564
| Patent: | US 3461564 |
| Title: | Ellipse Forming Compass |
| Date: | 19.08.1969 |
| Place: | |
| Country: | USA |
| Person: | R. M. OMalley |
| Company: | |
| Internal Links: | Ellipsograph |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US3461564 (espacenet), US3461564 (uspto) |
Aus der Patentschrift US3461564
- DATUM: 19.08.1969
- TITEL: ELLIPSE-FORMING COMPASS
- PERSON: ROBERT M O MALLEY