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Patent:US2072429
| Patent: | US 2072429 |
| Title: | Accounting machine |
| Date: | 02.03.1937 |
| Place: | New York |
| Country: | USA |
| Person: | Peirce, John Royden (P) |
| Company: | IBM (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2072429 (espacenet), US2072429 (uspto) |
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