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Patent:GB395904
| Patent: | GB 395904 |
| Title: | Improvements in perpetual calendars |
| Date: | 27.07.1933 |
| Place: | London |
| Country: | Great Britain |
| Person: | Cory Hanrott, Harcourt |
| Company: | Handy Things Ltd. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB395904 |
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