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Patent:US2239959
| Patent: | US 2239959 |
| Title: | Course Converter for Conveyances |
| Date: | 29.04.1941 |
| Place: | |
| Country: | USA |
| Person: | L. R. Gray |
| Company: | |
| Internal Links: | Analogrechner, Rechenscheibe |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US2239959 (espacenet), US2239959 (uspto) |
Aus der Patentschrift US2239959
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