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Patent:US2564227
| Patent: | US 2564227 |
| Title: | Calculating Device |
| Date: | 14.08.1951 |
| Place: | |
| Country: | USA |
| Person: | Pepper, P. M. (P) |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2564227 (espacenet), US2564227 (uspto) |
Aus der Patentschrift US2564227
- DATUM: 14.08.1951
- TITEL: Calculating device