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Patent:US219156
| Patent: | US 219156 |
| Title: | Improvement in calendars |
| Date: | 02.09.1879 |
| Place: | Albany, NY |
| Country: | USA |
| Person: | Heath, John E. |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US219156 (espacenet), US219156 (uspto) |
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