Patent:US2422103
Patent: | US 2422103 |
Title: | Duplex Calculating Machine |
Date: | 10.06.1947 |
Place: | |
Country: | USA |
Person: | Lambert, H. L. (P) |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | US2422103 (espacenet), US2422103 (uspto) |
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