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Patent:US1788996
13.01.1938 O. Gaedke : Apparatus for evaluating functions of two independent variables
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Patent:US2104051
04.01.1938 Niemann, Frederick (P) Adolph : Calculating Machine
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Patent:US2105103
11.01.1938 Nicholas Sinitzin-White John L.R. Glover Nicholas N. Solovioff : Navigation instrument
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Patent:US2105147
11.01.1938 Henry B. Inglis : Bomb sight and pilot director
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Patent:US2105520
18.01.1938 Carlström, Bengt Roy Hanson AB Facit (P) : Calculating machine and the like
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18.01.1938 Dicke, Allen (P) NCR (P) : Cash register
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18.01.1938 Shipley, Bernis (P) NCR (P) : Cash register
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Patent:US2105985
18.01.1938 Papello, Karl (P) Bausch & Lomb Optical Comp. : Sighting device for following aerial targets
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25.01.1938 E. F. Stover : Gyroscopic Fluid Meter
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25.01.1938 Howard Moffat Fleming Gardner (P) Comp. : Register
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25.01.1938 Bryce, James (P) IBM (P) : Accounting machine
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01.02.1938 Locke, Karl (P), Brunhuber, Rudolf (P) : Zero resetting mechanism for registers
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01.02.1938 Dreher, Elmer H. (P) Remington (P) Rand Inc : Combined tabulating and punching mechanism
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01.02.1938 Garbell, Max (P) Victor (P) Adding Machine Co. : Cash register
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01.02.1938 Crosman, Loring Pickering (P) Gardner (P) Calculator Company : Listing Adding Machine
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01.02.1938 W. W. Lasker : Bowden Wire
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08.02.1938 Friedrich Ewald Heinrich Konra Wanderer (P) Werke Vorm Winklhofer : Device for calculating machines, accounting machines, writing and like machines
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Patent:US2107445
08.02.1938 Albert Klaar Friedrich Arndt Helmut Berning NCR (P) : Controlling mechanism for cash registers and bookkeeping machines
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15.02.1938 Lancelot Martin Simpson Automatic Telephone und Electric Co. : Ratio computer
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15.02.1938 Dahlberg, Tord Olof Rickard (P) : Calculating machine differential mechanism
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15.02.1938 Rudin, Karl Viktor (P) Facit (P) : Calculating Machine
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22.02.1938 Charles W. Green NCR (P) : Cash register
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22.02.1938 Karl August Lehmann Ernst Breitling NCR (P) : Cash register o
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02.02.1938 Johann Maria Baykaw Deutsche Luftfahrt- und Handels-Aktien-Gesellschaft : Instrument for indicating navigational factors
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22.02.1938 Breitling, Ernst (P) NCR (P) : Cash register
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08.03.1938 Robert L. Muller Burroughs (P) Adding Machine Co. : Accounting machine
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15.03.1938 Daly, George F. (P) IBM (P) : Tabulating machine
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15.03.1938 Fuller, Frederick (P) George F. Daly IBM (P) : Department store machine
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15.03.1938 Hugh F. Carman Herbert H. Woodruff IBM (P) : Tabulating machine
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15.03.1938 Breitling, Ernst (P), Patzeit, Julius (P) NCR (P) : Cash register, accounting, and the like machines
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15.03.1938 Kämmel, Hugo Ernst Mercedes (P) Büromaschinen-Werke AG : Shift and driving mechanism for adding machines
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15.03.1938 Mills, Albert (P) IBM (P) : Tabulating machine
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15.03.1938 Mills, Albert (P) Edward J. Rabenda IBM (P) : Printing mechanism
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22.03.1938 Breitling, Ernst (P) NCR (P) : Cash register
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22.03.1938 Rabe, Karl (P) : Drawing Instrument
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22.03.1938 Rainbolt Katherine D : Roofing calculator
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29.03.1938 Richard Stuhlmacher Wanderer (P) Werke Vorm Winklhofer : Frame for typewriters, calculating machines, and the like
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29.03.1938 Winkley, Erastus united shoe machinery corp : Measuring machine
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29.03.1938 R. E. Woolley : Measuring Apparatus
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05.04.1938 McCormick, Otis : Data computer
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05.04.1938 Hans Raaber Actiengesellschaft V.P. Goerz : Bomb sight
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05.04.1938 Bryce, James (P) IBM (P) : Multiplying device
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05.04.1938 Ernest Charles McClure Powers Accounting Machines Ltd. : Sterling calculating machine
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05.04.1938 Shipley, Bernis (P) Pascal Spurlino Everett H. Placke NCR (P) : Accounting machine
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12.04.1938 Reynold B. Johnson IBM (P) : Examination paper grading device
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12.04.1938 Tauschek, Gustav (P) IBM (P) : Tabulating machine
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19.04.1938 Mehan, Thomas O. (P) Remington (P) Rand Inc : Computing and listing machine
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26.04.1938 Hubert Neureiter Helmut Berning NCR (P) : Cash register
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03.05.1938 Pitman, Henry L. (P) Underwood Elliott-Fisher (P) Comp. : Combined typewriting and computing machine
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03.05.1938 Robertson, William (P) NCR (P) : Printing mechanism for cash registers
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03.05.1938 Charles H. Sampson : Calculating attachment for printing machines
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03.05.1938 Papello, Karl (P) Firm Carl Zeiss : Camoid gearing
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10.05.1938 Charles H. Colvin : Aircraft navigating instrument
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10.05.1938 John W. Armbruster IBM (P) : Tabulating and accounting machine
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10.05.1938 Breitling, Ernst (P) NCR (P) : Cash register, accounting and the like machine
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10.05.1938 C. Jan Dussel : Calculating Device
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10.05.1938 Adolf Holzner : Counter with telescoped number wheels
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17.05.1938 Howard Gilmore : Decimal point indicating mechanism for Slide Rule computations
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17.05.1938 Robertson, William (P) NCR (P) : Cash register
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17.05.1938 W. E. Mathi Marchant (P) : Calculating Machine
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24.05.1938 E. E. Mansur : Catamenial Calendar
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24.05.1938 Butler, Thomas M. (P) Burroughs (P) Adding Machine Comp. : Calculating machine
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24.05.1938 Crosman, Loring Pickering (P) Monroe (P) Calculating Machine : Listing Adding Machine
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24.05.1938 Ball, Robert (P) : Calculator
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31.05.1938 Pitman, Henry L. (P) Underwood Elliott-Fisher (P) Comp. : Combined typewriting and computing machine
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31.05.1938 Beria, Biagio Società Anonima Officine di Villar Perosa (RIV (P)) : Ribbon feed mechanism
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31.05.1938 Marie Bister Germain Justin : Calculating Machine
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07.06.1938 Breitling, Ernst (P) NCR (P) : Totalizer engagement control device
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14.06.1938 Bryce, James (P) IBM (P) : Accounting machine
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14.06.1938 Breitling, Ernst (P) NCR (P) : Bookkeeping machine
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14.06.1938 J. G. Valenzuela : Slide Rule
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21.06.1938 T. R. Harrison : Integrator Mechanism for Measuring Instruments
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21.06.1938 P. Padva et al : Automatic Line Tracker
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21.06.1938 Britten, Edwin (P) Gardner (P) Calculator Company : Calculating Machine
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28.06.1938 Leo G. A. Kommling NCR (P) : Cash register
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05.07.1938 Mcmaster Archie J G M Lab Inc : Indicating and calculating system
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12.07.1938 IBM (P) : Watch type cryptograph
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12.07.1938 F. A. Hart Remington-Rand (P) : Typewriting and Like Machine
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19.07.1938 W. C. Wagner : Fluid Meter
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19.07.1938 Lasker, William Walter (P) Remington (P) Rand Inc : Sub and grand total mechanism
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26.07.1938 Bryce, James (P) IBM (P) : Statistical machine
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02.08.1938 Green, Charles (P) NCR (P) : Cash register
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02.08.1938 Paul Verdier : Hosiery calculator
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09.08.1938 Hermann Weinlich Ulrich Kölm IBM (P) : Record controlled tabulator type
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09.08.1938 Charles Campbell IBM (P) : Accounting machine
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09.08.1938 Daly, George F. (P) IBM (P) : Tabulating machine
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09.08.1938 Russell A. Rowley IBM (P) : Multiplying machine
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16.08.1938 Rolf Erik Annerén Bengt Carlström AB Facit (P) : Reversing Mechanism
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23.08.1938 L. F. Murguia : Record Calendar
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23.08.1938 Johnstone, Harold G. (P) : Computing Apparatus
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23.08.1938 Placke, Everett H. (P) Tasker, George H. (P) NCR (P) : Paper feed mechanism for cash registers
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23.08.1938 Christian, Raymond A. (P) NCR (P) : Calculating Machine
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30.08.1938 Dahlberg, Tord Olof Rickard (P) : Tens transmitting device for adding machines
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30.08.1938 Mcgay John B Pittsburgh Equitable Meter Co : Chart calculating machine
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06.09.1938 Frederick Duby : Adding machine
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Patent:US2130350
20.09.1938 Harry L. Lambert Allen Wales Adding Machine Corp. : Circuit breaker
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20.09.1938 Niemann, Frederick (P) Adolph et al : Calculating Machine
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20.09.1938 Kottmann, August (P) Rheinmetall (P) : Calculating machine
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27.09.1938 Kölm, Ulrich IBM (P) : Tabulating machine
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27.09.1938 Arnold, Charles (P) NCR (P) : Cash register
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27.09.1938 Anderson, Walter (P) Underwood Elliott-Fisher (P) Comp. : Computing machine
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04.10.1938 Torkelson, Torkel (P) IBM (P) : Multiplying machine
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04.10.1938 Schluns, Carl (P) Mercedes (P) Büromaschinen Werke : Calculating Machine
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11.10.1938 Gollwitzer, Walter (P) Addressograph-Multigraph : Printing machine
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Patent:US2133046
11.10.1938 Schane Edward H Fanner Mfg Company : Calculator
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18.10.1938 Bolongaro, James (P) : Apparatus for calculating the spacing of type for printed matter
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25.10.1938 Grantham, James John F. Alexander; Harry A. Newby : Calendar
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25.10.1938 Crosman, Loring Pickering (P) Monroe (P) Calculating Machine Comp. : Listing calculator
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25.10.1938 Lincoln M. Keefe Remington (P) Rand Inc : Record controlled machine
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25.10.1938 S. C. Brown : Variator for Weight Integrating Devices
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Patent:US2135783
08.11.1938 Carl Arnold : Mechanical toy imitating a calculating horse
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Patent:US2136169
08.11.1938 Keuffel, Adolf W. (P) : Slide Rule Indicator
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15.11.1938 Thomas M. Butler Burroughs (P) Adding Machine Co. : Business machine
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15.11.1938 Laiho, Jalmer (P) : Calculating Machine
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15.11.1938 Richard C. Bradley Reconstruction Finance Corp. : Register with preset trip mechanism
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22.11.1938 N. Sinitzin-White : Slide Rule
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22.11.1938 W. C. Dorr et al : Instruction Device for Time Telling
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Patent:US2137845
22.11.1938 Klaar, Albert (P) Anker (P) Werke AG : Blocking device for cash registers, bookkeeping machines, or the like
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Patent:US2137847
22.11.1938 E. E. Libman : Steering Moving Craft
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Patent:US2138414
29.11.1938 J. Weckert : Ellipse or Circle Compass
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Patent:US2138482
29.11.1938 John T. Davidson NCR (P) : Accounting machine
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Patent:US2138630
29.11.1938 John W. Galyon IBM (P) : Tabulating machine
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Patent:US2138636
29.11.1938 Lake, Clair (P) IBM (P) : Commutator
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Patent:US2138879
06.12.1938 R. B. Poole : Slide Rule
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06.12.1938 Muller, Robert (P) Burroughs (P) : Calculating Machine
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06.12.1938 Muller, Robert (P) Burroughs (P) : Calculating Machine
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06.12.1938 Muller, Robert (P) Burroughs (P) : Calculating Machine
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Patent:US2139718
13.12.1938 Breitling, Ernst (P) NCR (P) : Cash register, accounting, and the like machine
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Patent:US2139719
13.12.1938 Breitling, Ernst (P), Wagner, Erich (P) NCR (P) : Cash register
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13.12.1938 Ganger, Jesse R. (P) NCR (P) Co : Calculating Machine
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Patent:US2140135
13.12.1938 Landsiedel, Walter W. Remington Rand (P) Inc : Noise reducing device for adding machines and the like
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13.12.1938 Lasker, William Walter (P) Remington (P) Rand Inc : Tabulating machine
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13.12.1938 Shoup, Ransom P. Shoup Voting Machine Corp. : Counter
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Patent:US2140424
13.12.1938 : Cryptographic device
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Patent:US2140579
20.12.1938 Harold E. Gray : Averaging device
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Patent:US2140839
20.12.1938 Hennessy, Mark M. Durant (P) Mfg. Co. : Counter
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Patent:US2141158
27.12.1938 Robert Anschutz Mercedes (P) Buromaschinen Werke A : Typewriter, typewriter calculating machine, and the like
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27.12.1938 Heinrich Konrad Friedrieh Ewald Johannes Gebhardt Wanderer (P) Werke vorm. Winklhofer und Jaenicke : Control mechanism for calculating machines
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27.12.1938 Arnold, Charles (P) NCR (P) : Cash register
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27.12.1938 Arnold, Charles (P) NCR (P) : Cash register
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Patent:US2141464
27.12.1938 H. H. Gorrie : Regulating Apparatus
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Patent:US2141597
27.12.1938 James M. Cunningham IBM (P) : Decimal point control for accounting machines
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27.12.1938 Bryce, James (P) IBM (P) : Automatic decimal point selecting device for accounting machines
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27.12.1938 Bryce, James (P) IBM (P) : Checking device for multiplying machines
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08.11.1938 Samuel J. Sigaloff : Design for a guide chart or similar article
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10.05.1938 Lasker, William Walter (P) Remington (P) Rand Inc : Card punching machine
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23.08.1938 K. Rabe : Drawing Instrument