| Signature mark | NL 124/131 |
|---|---|
| Title | Patentunterlagen zu britischen Patentanmeldungen von Dirks |
| Contains | Beschreibung betr. Patentanmeldung: 37234/54 "Improvements in or relating to Electric Calculators" (cont.), o.D. 9240/56 "Improvements in Electric Calculators", 1956 9271/56 "Improvements in the Control of Typewriters and other Keyboard- 9634/56 "Improvements in Electric Calculators", 1956 Operated Machines", 1956 Korrespondenz mit dem Patent Office, London, u. Beschreibung betr. Patentanmeldung 9441/56 "Improvements in Electric Calculators" 1956-1959 |
| Duration | 1956 - 1959 |
| Scope | 1 M. ms. u. gedr., Kopie) |
| Rights notice | CC BY-SA 4.0 |
