Patent:GB231502
Brevetto: | GB 231502 |
Titolo: | Improvements in ciphering machines having a plurality of ciphering rollers for effecting substitution of the signs |
Data: | 29.10.1925 |
Luogo: | |
Nazione: | Gran Bretagna |
Persona: | |
Ditta: | Chiffriermaschinen (P) AG |
Link interni: | Chiffriergerät |
Keywords: | |
Link al brevetto: (without guarantee) | ![]() |