Patent:GB190909509
Brevetto: | GB 190909509 |
Titolo: | Improvements relating to Calculating Machines |
Data: | 21.04.1910 |
Luogo: | |
Nazione: | Gran Bretagna |
Persona: | Felt, Dorr E. (P) |
Ditta: | |
Link interni: | |
Keywords: | |
Link al brevetto: (without guarantee) | GB190909509 |
- DATUM: 21.04.1910
- TITEL: Improvements relating to Calculating Machines.
- PERSON: FELT DORR EUGENE US