Patent:US2253229
Brevetto: | US 2253229 |
Titolo: | Calculating Machine |
Data: | 19.08.1941 |
Luogo: | |
Nazione: | Stati Uniti |
Persona: | Christian, Raymond A. (P) |
Ditta: | NCR (P) |
Link interni: | |
Keywords: | |
Link al brevetto: (without guarantee) | ![]() ![]() |
- DATUM: 19.08.1941
- TITEL: Calculating machine
- PERSON: NCR CO
- Patent Family: ( Patent:US2127673, Patent:US2253229 )