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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Collins, Norman


 
  • Patent:GB123938 13.03.1919 Collins, Norman (P) und Wallis Abraham Gray (P) : Improvements in or relating to Clock Movements.
  • Patent:GB190218562 18.06.1903 Collins, Norman (P) : An Improved Calculator

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