Patent:US2911150
Patent: | US 2911150 |
Titel: | Telephone call charge and tax calculator |
Datum: | 03.11.1959 |
Ort: | |
Land: | USA |
Person: | Schunneman Robert, George Riggs |
Firma: | Bell Telephone Labor Inc |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US2911150 (espacenet), US2911150 (uspto) |
- DATUM: 03.11.1959
- TITEL: Telephone call charge and tax calculator
- PERSON: BELL TELEPHONE LABOR INC