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Die große Enzyklopädie des mechanischen Rechnens

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Patents  Great Britain  1978

 
  • Patent:GB1517742 12.07.1978 Branch Pollard, William Samuelson Film Service Ltd. : Photographic depth-of-field calculators
  • Patent:GB1517976 19.07.1978 Salvia Werk : Circular Slide Rule Suitable For Use In Determining The Electrolyte Deficiency In Infusion Therapy
  • Patent:GB1527633 04.10.1978 Matsuda, Akira : Foreign exchange ready reckoner
  • Patent:GB1528892 18.10.1978 Directeur-generaal der Posterijen, Telegrafie en Telefonie : Calculating device
  • Patent:GB1530487 01.11.1978 Peters M : Plane Triangle Solver

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