Signature mark | NL 124/132 |
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Title | Patentunterlagen zu britischen Patentanmeldungen von Dirks |
Contains | Patent Specification 786.021 "Improvements in or Relating to Electric Calculators", 13.11.1957 |
Duration | 1957 |
Scope | 89 Bl. gedr. |
Rights notice | CC BY-SA 4.0 |