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Patent:US1715170
| Patent: | US 1715170 |
| Title: | Calculating machine |
| Date: | 28.05.1929 |
| Place: | Detroit |
| Country: | USA |
| Person: | Frederick O. Mueller |
| Company: | Burroughs (P) Adding Machine Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1715170 (espacenet), US1715170 (uspto) |
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