Patent:US1812129
Patent: | US 1812129 |
Titel: | Calculating mechanism for adding and listing machines |
Datum: | 30.06.1931 |
Ort: | |
Land: | USA |
Person: | Barrett, Glenn (P) |
Firma: | Portable Adding Machine Compan |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US1812129 (espacenet), US1812129 (uspto) |
- DATUM: 30.06.1931
- TITEL: Calculating mechanism for adding and listing machines
- PERSON: PORTABLE ADDING MACHINE COMPAN
- Patent Family: ( Patent:US1734069, Patent:US1784862, Patent:US1788376, Patent:US1811840, Patent:US1812129, Patent:US1812130 )