Patent:US2644636
Patent: | US 2644636 |
Title: | Control Mechanism for Accounting Machines |
Date: | 07.07.1953 |
Place: | |
Country: | USA |
Person: | Christian, Raymond A. (P) et al |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() ![]() |
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