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Patent:US3047221
| Patent: | US 3047221 |
| Title: | Calculator |
| Date: | 31.07.1962 |
| Place: | |
| Country: | USA |
| Person: | Raymond Alfaya, Thaxton Karl, Landskroener Peter |
| Company: | Du Pont |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US3047221 (espacenet), US3047221 (uspto) |
Aus der Patentschrift US3047221
- DATUM: 31.07.1962
- TITEL: Calculator
- PERSON: DU PONT