Patent:US1779774
Patent: | US 1779774 |
Titel: | Means for calculating the ratio of variable quantities |
Datum: | 28.10.1930 |
Ort: | |
Land: | USA |
Person: | George Alfred Julius, Francis Julius Awdry |
Firma: | |
Links im Rechnerlexikon: | Analogrechner, Proportionalrechner |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US1779774 (espacenet), US1779774 (uspto) |
- DATUM: 28.10.1930
- TITEL: Means for calculating the ratio of variable quantities