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Patentunterlagen zu britischen Patentanmeldungen von Dirks

Signature mark NL 124/131,1
Title Patentunterlagen zu britischen Patentanmeldungen von Dirks
Contains Patent Specification betr. Patent:
786.021 "Improvements in or Relating to Electric Calculator", 23.09.1950
820.115 "Improvements in Storage Devices for Signals", 15.01.1957
Duration 1950 - 1957
Scope 1 M. gedr., Kopie
Rights notice CC BY-SA 4.0
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