Patent:GB706807
Patent: | GB 706807 |
Titel: | Improvements in devices for illustrating and teaching the elementary technic of calculating |
Datum: | 07.04.1954 |
Ort: | |
Land: | Großbritannien |
Person: | Svensson, Sven Hjalmar (P) |
Firma: | Skolmaterieldistrib A B |
Links im Rechnerlexikon: | Lehrmittel |
Schlagworte: | |
Link zum Patentamt: (ohne Garantie) | GB706807 |
- DATUM: 07.04.1954
- TITEL: Improvements in devices for illustrating and teaching the elementary technic of calculating
- PERSON: SKOLMATERIELDISTRIB A B