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Pagina principale
Patent:US1910738
| Brevetto: | US 1910738 |
| Titolo: | Locking and Clearing Mechanism for Calculating Machines |
| Data: | 23.05.1933 |
| Luogo: | |
| Nazione: | Stati Uniti |
| Persona: | Avery, Harold (P) |
| Ditta: | Marchant (P) |
| Link interni: | |
| Keywords: | |
| Link al brevetto: (without guarantee) |  US1910738 (espacenet), US1910738 (uspto) |
Aus der Patentschrift US1910738
- DATUM: 23.05.1933
- TITEL: Locking and clearing mechanism for calculating machines