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Patent:US762520
| Patent: | US 762520 |
| Title: | Calculating Machine |
| Date: | 14.06.1904 |
| Place: | |
| Country: | USA |
| Person: | Felt, Dorr E. (P) |
| Company: | Felt und Tarrant (P) |
| Internal Links: | |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US762520 (espacenet), US762520 (uspto) |
Aus der Patentschrift US762520