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Patent:US1661110
| Patent: | US 1661110 |
| Title: | Calendar |
| Date: | 28.02.1928 |
| Place: | Brooklyn |
| Country: | USA |
| Person: | Cox, John D. |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US1661110 (espacenet), US1661110 (uspto) |
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