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Patent:CA312156
| Patent: | CA 312156 |
| Title: | Calculating machine mechanism |
| Date: | 09.06.1931 |
| Place: | |
| Country: | Canada |
| Person: | Foothorap, Harry Arthur (P) |
| Company: | Elliott-Fisher (P) Comp. |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CA312156 |
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