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Die große Enzyklopädie des mechanischen Rechnens

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Patents  Great Britain  1972

 
  • Patent:GB1272760 03.05.1972 Giancarlo Gaggero Carla Mongini-Tamagnini Antoine Settipani Euratom : Circular calculator for the solution of problems connected with electromagnetic radiation penetration
  • Patent:GB1276784 07.06.1972 Dogigli, Johannes (P) ITAB Dogigli (P) KG : Slide Rule
  • Patent:GB1277673 14.06.1972 John Forsyth Fletcher : Currency conversion calculator
  • Patent:GB1299744 13.12.1972 Oba, Harutaro; Sawazu, Toshihiko; Takeuchi, Sugio; Chikata, Masaru Tokyo Electric Comp. Ltd. : An adding, subtracting and totaling calculator
  • Patent:GB1299961 13.12.1972 Oba, Harutaro; Sawazu, Toshihiko; Takeuchi, Sugio; Yamaguchi, Norio Tokyo Electric Comp. Ltd. : An adding, subtracting and totaling calculator

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