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Patent:CA439894
| Patent: | CA 439894 |
| Title: | Electric calculating machine |
| Date: | 25.02.1947 |
| Place: | |
| Country: | Canada |
| Person: | Luhn, Hans P. (P) |
| Company: | IBM (P) International Business Machines Corp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CA439894 |
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