Patent:FR403912
Patent: | FR 403912 |
Title: | Perfectionnements aux machines à calculer |
Date: | 06.10.1909 |
Place: | |
Country: | France |
Person: | Felt, Dorr E. (P) |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | FR403912 |
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