Patent:US1494450
Patent: | US 1494450 |
Titel: | Testing and locking device in combination with calculating machines |
Datum: | 20.05.1924 |
Ort: | |
Land: | USA |
Person: | Tillman Ferdinand J |
Firma: | |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | US1494450 (espacenet), US1494450 (uspto) |
- DATUM: 20.05.1924
- TITEL: Testing and locking device in combination with calculating machines