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Patent:US879178
| Patent: | US 879178 |
| Title: | Proportional Calculating Machine |
| Date: | 18.02.1908 |
| Place: | |
| Country: | USA |
| Person: | C. R. Kelly |
| Company: | |
| Internal Links: | Nürnberger Schere, Analogrechner |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US879178 (espacenet), US879178 (uspto) |
Aus der Patentschrift US879178