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25.03.1909 Bordt, Adolf (P) : Adding-machine
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15.01.1909 Wetmore, Charles (P) : Computing Machine
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12.01.1909 Hallwood, Henry S. (P) Annie Hallwood : Cash-register
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19.01.1909 Carrol, Thomas (P) NCR (P) : Keyboard mechanism for registering-machines
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19.01.1909 Carrol, Thomas (P) NCR (P) : Keyboard mechanism for registering-machines
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26.01.1909 Charles P. Kettering NCR (P) : Driving mechanism for registering machines
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26.01.1909 Vincent, Jesse Gurney (P) Burroughs (P) Adding Machine Comp. : Adding machine
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26.01.1909 Thomas J. Falvey : Attachment for calculating-machines
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02.03.1909 Oscar C. Kreis Burroughs (P) Adding Machine Comp. : Carriage mechanism for adding machines
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02.03.1909 Ferdinand J. Tillman : Calculating attachment for type-writing machines
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02.03.1909 Vincent, Jesse Gurney (P) Burroughs (P) Adding Machine Comp. : Adding machine
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09.03.1909 Meilicke, Carl Arno (P) : Calculating machine
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23.03.1909 Clifford van Horne : Table
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30.03.1909 Frank J. Kristofek Meek Comp. : Calculator
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30.03.1909 William H. Pike, Jr. : Recording mechanism
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06.04.1909 Lorenze D. Roberts : Calculating-machine
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20.04.1909 Gardner, Clyde (P) : Recording mechanism
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27.04.1909 George William Katzung : Counting-machine
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27.04.1909 Vincent, Jesse Gurney (P) White, Nelson (P) Burroughs (P) Adding Machine Comp. : Adding and Listing Machine
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04.05.1909 Cleal, Joseph P. (P), McCauley, Alvan (P) NCR (P) : Cash-register
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04.05.1909 Rudolph C. Smith : Calculating-scale
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25.05.1909 Vincent, Jesse G. Burroughs (P) Adding Machine Co. : Line and column gage for adding-machines
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08.06.1909 Kettering, Charles (P) NCR (P) : Mechanical clutch
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08.06.1909 Louis E. Graves : Calculating device for electrical data
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08.06.1909 Cheape, John Albert (P) Simplex Adder Comp. : Adding device
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22.06.1909 Thomas Nelson Horner : Register
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06.07.1909 F. W. Durand : Planimeter
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13.07.1909 William L. Dench Elliott-Fisher (P) Comp. : Variable automatic spacing mechanism for combined type writing and adding machines
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13.07.1909 Trinks, Franz (P) : Calculating machine
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20.07.1909 Muzzy, William H. NCR (P) : Distant register
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20.07.1909 Albert J. Meier Duplex Adding Machine Comp. : Calculating machine
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27.07.1909 Kilpatrick, William J. (P) Burroughs (P) Adding Machine Comp. : Adding machine
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27.07.1909 Vincent, Jesse Gurney (P) Burroughs (P) Adding Machine Comp. : Carriage mechanism for adding machines
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27.07.1909 Adolphus G. Meier Duplex Adding Machine Comp. : Calculating machine
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03.08.1909 Charles F. Laganke Elliott-Fisher (P) Comp. : Variable spacing mechanism for combined type writing and calculating machines
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10.08.1909 Nelson, L. M. : Proportion Dividers
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17.08.1909 Ramsdell, Lyndon O. Peabody Leather Machinery Comp. : Machine for measuring surface areas
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24.08.1909 Dreyfus, Armand Albert Abraham (P) und Levy, Alfred Henry Victor (P) : Calculating machine
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07.09.1909 Carl L. Nelson : Calculating Machine
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28.09.1909 Carroll, Thomas NCR (P) : Cash-registers
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28.09.1909 Trinks, Franz (P) : Calculating machine
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05.10.1909 Roy L. Burd Burroughs (P) Adding Machine Comp. : Adding machine
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12.10.1909 Robert Rein : Carrying mechanism
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02.11.1909 Edward J. Von Pein NCR (P) : Cash-register
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02.11.1909 Wetmore, Charles (P) Comptograph (P) Comp. : Actuating mechanism for adding machines
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02.11.1909 Aberle, Edward : Computing-Table
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02.11.1909 Robert Rein : Calculating machine
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09.11.1909 Muzzy, William (P) NCR (P) : Cash-register
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23.11.1909 McFarland, Charles Numan (P) Adder Machine Comp. : Keyboard locking mechanism for adding machines
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23.11.1909 Wales, Charles (P) : Adding machine
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23.11.1909 White, Nelson (P) Adder Machine Comp. : Lock for numeral-wheels for adding-machines
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23.11.1909 Brandt, Edward J. (P) Brandt Cashier Comp. : Calculating implement
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23.11.1909 Edward J. Brandt Brandt Cashier Comp. : Designating, recording and registering mechanism
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21.12.1909 Clifford van Horne : Table
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21.12.1909 George Wilson Goss Charles M. Acrey : Calculator
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21.12.1909 Meilicke, Carl Arno (P) : Calculating Machine
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28.12.1909 Ebenezer Hill, Jr. : Tide-set-calculating instrument for navigators
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28.12.1909 Tobias Baeuerle Firma Math. Bäuerle : Calculating machine
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19.04.1909 Lemaignen, Robert Bertin Auguste : Zeroizing mechanism