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Patent:US920025
| Patent: | US 920025 |
| Title: | Integrating Device and Recording Manometer |
| Date: | 27.04.1909 |
| Place: | |
| Country: | USA |
| Person: | F. N. Connet |
| Company: | |
| Internal Links: | Planimeter |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US920025 (espacenet), US920025 (uspto) |
Aus der Patentschrift US920025