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Patent:US3279693
| Patent: | US 3279693 |
| Title: | Four-Species Calculating Machine |
| Date: | 18.10.1966 |
| Place: | |
| Country: | USA |
| Person: | Eggebrecht, Rudolf (P) ; Metschnabel, Andreas (P) |
| Company: | Diehl (P) |
| Internal Links: | Diehl Transmatic |
| Keywords: | |
| Link to the patent office: (without guarantee) |  US3279693 (espacenet), US3279693 (uspto) |
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