Patent:US1439936
Patent: | US 1439936 |
Title: | Calculator |
Date: | 26.12.1922 |
Place: | |
Country: | USA |
Person: | W. L. Wyckoff |
Company: | |
Internal Links: | |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() ![]() |
- DATUM: 26.12.1922
- TITEL: Calculator
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