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Patent:US1944657
| Patent: | US 1944657 |
| Title: | Control device for accounting machines |
| Date: | 23.01.1931 |
| Place: | Detroit und New York |
| Country: | USA |
| Person: | Howard C. Einstein |
| Company: | IBM (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1944657 (espacenet), US1944657 (uspto) |
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