Patent:GB191318763
Patent: | GB 191318763 |
Titel: | Improvements in or relating to Subtraction Devices for Self-writing Adding Machines |
Datum: | 18.08.1913 |
Ort: | Stockholm |
Land: | Großbritannien |
Person: | |
Firma: | Aktiebolaget Adderator (P) |
Links im Rechnerlexikon: | |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | ![]() |
complete specification not accepted