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Patent:CA536041
| Patent: | CA 536041 |
| Title: | Calculating machine |
| Date: | 22.01.1957 |
| Place: | |
| Country: | Canada |
| Person: | Webb, Christopher Frederick (P) |
| Company: | Bell Punch (P) Comp. Ltd |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  CA536041 |
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