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Patent:GB190403383
| Patent: | GB 190403383 |
| Title: | Improvements in Apparatus for Adding or Calculating |
| Date: | 11.04.1905 |
| Place: | Liverpool |
| Country: | Great Britain |
| Person: | Benjamin Thompson OBrien Walter Henry Browning |
| Company: | |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  GB190403383 |
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