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07.01.1913 Hopkins, William (P) Wallace : Calculating-machine
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07.01.1913 W. H. Pike : Adding and Recording Machine
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07.01.1913 F. L. H. Sims : Key Operated Mechanism for Actuating, Recording, or Indicating Apparatus
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07.01.1913 H. C. Peters : Adding Machine
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07.01.1913 Rinsche, Frank Charles (P) : Calculating Machine
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14.01.1913 R. M. Hamby : Slide Rule
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14.01.1913 John W. Leloux : Liquid meter
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14.01.1913 W. H. Pike, Jr. : Controlling Device for Power Driven Machines
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21.01.1913 William H. Pike Jr. Burroughs (P) Adding Machine Comp. : Attachment for adding and recording machines
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04.02.1913 William M. McCarthy NCR (P) : Cash register
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04.02.1913 C. L. Nelson : Calculating Machine
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11.02.1913 C. E. W. Gardner : Recording Mechanism
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18.02.1913 Anthony Stocker : Table holder
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18.02.1913 Frederick Wheat Burroughs (P) Adding Machine Comp. : Adding machine
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18.02.1913 Samuel G. Dorman William H. Clayton Dalton (P) Adding Machine Comp. : Adding and writing machine
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25.02.1913 W. H. H. Knight : Register
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25.02.1913 Vincent, Jesse Gurney (P) Burroughs (P) Adding Machine Comp. : Power drive for adding machines
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04.03.1913 Carrol, Thomas (P) NCR (P) : Cash-register
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04.03.1913 W. S. Elliott : Ellipsograph
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18.03.1913 Ohmer, John (P) : Printing mechanism for ticket issuing and auditing machines
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25.03.1913 D. W. Erunton : Circular Slide Rule
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01.04.1913 Joseph W. Haley Charles B. Yelton : Register for lumber measurements
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01.04.1913 Barrett, Glenn (P) Smith Premier Typewriter Comp. : Type-writing and computing machine
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29.04.1913 John D. Wall : Framing attachment for carpenters squares
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06.05.1913 J. O. Almen : Calculating Machine
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06.05.1913 J. B. Moody : Interest Calculator
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13.05.1913 M. L. Cleary : Calculator
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20.05.1913 Wahl, John C. (P) Wahl (P) Adding Machine Co. : Calculating machine
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19.08.1913 J. W. Ledoux : Liquid Meter
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26.08.1913 B. C. Stickney : Combined Type Writing and Computing Machine
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09.09.1913 H. Richardson : Automatic Traveling Load Scale
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09.09.1913 Felt, Dorr E. (P) : Calculating Machine
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09.01.1913 Felt, Dorr E. (P) & Turck, Joseph Abraham Valentine (P) : Calculating Machine
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07.10.1913 J. P. Hunter & H. Küntzler : Keyboard Locking Mechanism for Adding Machines
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07.10.1913 M. Barr & E. R. Clarke : Calculating Machine
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11.11.1913 Landsiedel, Harry (P) Dalton (P) Adding Machine Comp. : Adding machine
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25.11.1913 Meilicke, Carl Arno (P) Meilicke Calculator Company : Calculator
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02.12.1913 Baldwin, Frank Stephen (P) : Calculating Machine
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16.12.1913 Jahnz, Erwin (P) Madas (P) : Calculating Machine
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30.12.1913 George Alfred Julius : Apparatus for Printing and Issuing Tickets or Checks of Different Denominations and for Registering and Totaling Numbers and Indicating the Totals
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21.10.1913 Piscicelli Taeggi, Roberto (P) NCR (P) (National Cash Register) : Cash Register