Patent:US1380754
Patent: | US 1380754 |
Title: | Integraph and Differentiator |
Date: | 07.06.1921 |
Place: | |
Country: | USA |
Person: | J. P. Van Bogaert |
Company: | |
Internal Links: | Planimeter, Integraph |
Keywords: | |
Link to the patent office: (without guarantee) | ![]() ![]() |
- DATUM: 07.06.1921
- TITEL: Integraph and differentiator