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Patent:DE648277
| Patent: | DE 648277 |
| Title: | Zehnerschaltvorrichtung für elektrische Rechenmaschinen |
| Date: | 01.01.1930 |
| Place: | New York |
| Country: | Germany |
| Person: | |
| Company: | Electrical Research Products Inc. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  DE648277 |
Aus der Patentschrift DE648277