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Die große Enzyklopädie des mechanischen Rechnens

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Search results for: Haddan, Reginald


 
  • Patent:GB191107105 09.08.1911 Haddan, Reginald (P) : Improvements in and relating to Adding Mechanism for Cash Registers and the like
  • Patent:GB191213037 22.11.1912 Haddan, Reginald (P) : Improvements in and relating to Adding and Transaction-counting Mechanism for Cash Registers, or Computing or Registering Machines
  • Patent:GB191414052 10.06.1915 Haddan, Reginald (P) NCR (P) : Improvements in Adding Machines
  • Patent:GB191417785 17.06.1915 Haddan, Reginald (P) NCR (P) : A New or Improved Change Indicator more particularly for Indicating Change in Cash Registers or Calculating Machines

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