Patente aus den USA 1920
- Patent:US1357747 02.01.1920 Turck, Joseph Abraham Valentine : Calculating Machine
- Patent:US1327044 06.01.1920 Mae Hosch Annie Measuregraph Company : Calculating Apparatus
- Patent:US1327318 06.01.1920 C. W. Gooch : Adding and Subtracting Machine
- Patent:US1327319 06.01.1920 C. W. Gooch : Adding Machine
- Patent:US1327320 06.01.1920 C. W. Gooch : Adding Machine
- Patent:US1328822 27.01.1920 James L. Dalton John Magnus Dalton Adding Machine Comp. : Adding and recording machine
- Patent:US1328830 27.01.1920 Friedman, Mitchell J. : Calendar
- Patent:US1328847 27.01.1920 Pentecost, Arthur Wales Adding Machine Comp. : Calculating machine
- Patent:US1329028 27.01.1920 Sundstrand, Gustaf David Rockford Milling Machine Compa : Listing Adding Machine
- Patent:US1329262 27.01.1920 Chase, George Clinton : Calculating Machine
- Patent:US1329871 03.02.1920 Horatio Whiting Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1329896 03.02.1920 Frome, John H. : Educational appliance
- Patent:US1329902 03.02.1920 Hemmi, Jiro : Slide Rule
- Patent:US1330132 10.02.1920 H. W. Nieman : Calculator
- Patent:US1330138 10.02.1920 Rowan-Legg, William Kinsley : Reference score reckoner
- Patent:US1330278 10.02.1920 Frank B. Palmer Wales Adding Machine Comp. : Calculating machine
- Patent:US1330651 10.02.1920 E. E. Phinney : Calculating Machine
- Patent:US1330652 10.02.1920 Phinney, Edgar E. Monroe Calculating Machine Comp. : Carriage shifting means for calculating machines
- Patent:US1330682 10.02.1920 Chase, George Clinton Chase Adding Machine Corp. : Register
- Patent:US1330893 17.02.1920 Charles R. Morse Morse Adding Machine Company : Computing machine
- Patent:US1331561 24.02.1920 Ensign, Emory Bleick Syndicate : Drive for calculating-machines
- Patent:US1332210 02.03.1920 Ford, Hannibal Ford Instr Co Inc : Calculating Instrument
- Patent:US1332229 02.03.1920 Odhner, Valentin Jakob : Coupling for detachably connecting coaxial shafts
- Patent:US1332543 02.03.1920 John P. Cluley Cluley Multiplier Comp : Computing machine
- Patent:US1333061 09.03.1920 Browne, Harry P.C. : Counting machine
- Patent:US1333253 09.03.1920 W. A. Homan : Adding Machine
- Patent:US1333277 09.03.1920 Niemann, Frederick Adolph Felt und Tarrant : Printing cut-out for adding-machines
- Patent:US1333307 09.03.1920 Gubelmann, William S. : Horizontal ruling mechanism for calculating and like machines
- Patent:US1333890 16.03.1920 John E. Wright : Tabulating machine
- Patent:US1334316 23.03.1920 Poole, Arthur Wahl Comp. : Calculating machine
- Patent:US1334533 23.03.1920 Gubelmann, William S. : Key interlocking mechanism for calculating and like machines
- Patent:US1334974 30.03.1920 Eric Elias Svensson : Detent for calculating-machine
- Patent:US1335070 30.03.1920 O. Malcher : Computing and Printing Scale
- Patent:US1335239 30.03.1920 Huber, Joseph : Work-support for calculating-machines
- Patent:US1335349 30.03.1920 Phinney, Edgar Monroe Calculating Machine Co : Automatic carriage raising means for calculating machines
- Patent:US1335794 06.04.1920 A. Pentecost and W. W. Fisher : Paper Carriage
- Patent:US1336192 06.04.1920 A. Briechle Wales Adding Machine Company : Accounting Machine
- Patent:US1336454 13.04.1920 Wherry John A : Collating device for typewriters and adding-machines
- Patent:US1336693 13.04.1920 Fuller, Frederick NCR : Cash register
- Patent:US1336836 13.04.1920 Harvey Corbin : Paper-support for combined adding and typewriting machines
- Patent:US1336840 13.04.1920 Johantgen, Oliver David : Listing Machine
- Patent:US1336900 13.04.1920 William P. Galloway : Interest-computing device
- Patent:US1336904 13.04.1920 Hopkins, Hubert Moon-Hopkins Billing Machine Co. : Calculating machine
- Patent:US1336990 13.04.1920 Martin Swenson : Calculator
- Patent:US1338274 27.04.1920 Bacon, George M. : Multiplying machine
- Patent:US1338481 27.04.1920 Wictor Oskar Julius Andersson : Calculating machine
- Patent:US1338588 27.04.1920 F. L. Prescott : Calculating Device
- Patent:US1338730 04.05.1920 Huntington, Robert : Spherical triangle calculator
- Patent:US1338876 04.05.1920 Skerl, Francesco; Graef, Forrest J. NCR : Ticket issuing accounting machine
- Patent:US1339542 11.05.1920 Charles Birth, W F Mckinley Wales Adding Machine Company : Calculating Machine
- Patent:US1339704 11.05.1920 Hart, Frederick Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1339796 11.05.1920 Stickney, Burnham Underwood Computing Machine Comp. : Combined adding and typewriting machine
- Patent:US1340374 18.05.1920 Chase, George Clinton : Adding Machine
- Patent:US1340435 18.05.1920 Bryce, James International Time Recording Company of New York : Cost-keeping-machine
- Patent:US1340827 18.05.1920 Benjamin P. Hayes Frank D. Laughlin Automatic Bookkeeping Register Comp. : Accounting machine
- Patent:US1341049 25.05.1920 J. C. Enberg : Calculating Machine
- Patent:US1342459 08.06.1920 W. J. Pasinski : Adding Machine
- Patent:US1342969 08.06.1920 Pentecost, Arthur Wales Adding Machine Comp. : Calculating machine
- Patent:US1343549 15.06.1920 C. J. Davidson : Slide Rule
- Patent:US1343660 15.06.1920 Arthur B. Christopher Measuregraph Comp. : Calculator
- Patent:US1344190 22.06.1920 Carlos Ruiz : Fraction-adding machine
- Patent:US1345102 29.06.1920 Pitman, Henry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1345460 06.07.1920 Pitman, Henry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1345697 06.07.1920 Joseph Louis Routin : Anti-aircraft-control system
- Patent:US1345706 06.07.1920 Louis Routin, Joseph : Range finder
- Patent:US1345781 06.07.1920 J. T. Hurley : Adding Machine
- Patent:US1345877 06.07.1920 Pitman, Henry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1347014 20.07.1920 Cyrus Corliss : Time Computing Apparatus
- Patent:US1347621 27.07.1920 Gustave O. Degener Underwood Computing Machine Com. : Combined typewriting and computing machine
- Patent:US1348573 03.08.1920 Haakon A. Martin NCR : Registering-machine
- Patent:US1348575 03.08.1920 Odhner, Valentin Jakob : Calculating-machine
- Patent:US1348576 03.08.1920 Odhner, Valentin Jakob : Calculating machine
- Patent:US1348942 10.08.1920 Gubelmann, William S. : Dating mechanism for calculating and like machines
- Patent:US1349049 10.08.1920 William J. Crumpton William R. Heath : Register
- Patent:US1349081 10.08.1920 Middleton Charles S : Interest Calculator
- Patent:US1349194 10.08.1920 Fitch, Charles Maximilian Bird Adding Machine Company : Adding Machine
- Patent:US1349246 10.08.1920 Walter Wright Underwood Computing Machine Com. : Combined typewriting and computing machine
- Patent:US1349386 10.08.1920 Pitman, Henry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1349628 17.08.1920 E. E. Phinney : Over Rotation Check for Calculating Machine Gears
- Patent:US1350727 24.08.1920 Alton D. Harmon John S. Owen Annie W.S. Strong : Computing-machine
- Patent:US1350850 24.08.1920 Arthur S. Trew Trew Tabulating Machine Comp. : Automatic pneumatic card tabulating machined
- Patent:US1351082 31.08.1920 Roy E. Wing Burroughs Adding Machine Comp. : Adding machine
- Patent:US1352973 14.09.1920 Robert E. Kimball : Setback-register
- Patent:US1353751 21.09.1920 Hutson, James L. : Perpetual calendar
- Patent:US1435485 02.10.1920 Leinert, Wenzel W. : Calculating device
- Patent:US1354778 05.10.1920 Pitman, Harry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1354839 05.10.1920 Phinney, Edgar Monroe Calculating Machine Comp. : Keyboard clearing means for registers
- Patent:US1354884 05.10.1920 Chase, George Clinton : Adding Machine
- Patent:US1354977 05.10.1920 Kammeyer, Charles : Type Gage
- Patent:US1355258 12.10.1920 Pentecost, Arthur Wales Adding Machine Comp. : Calculating machine
- Patent:US1355565 12.10.1920 Odhner, Valentin Jakob : Transfer mechanism of calculating-machines
- Patent:US1356072 19.10.1920 Adolph G. Kupetz Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1356322 19.10.1920 J. C. Stevens : Water Level Recorder and Volume Meter
- Patent:US1356605 26.10.1920 Dennis, A.S. : Calculating Machine
- Patent:US1357423 02.11.1920 John F. Robb : Accounting-machine-control means
- Patent:US1357748 02.11.1920 Turck, Joseph Abraham Valentine : Calculating Machine
- Patent:US1358058 09.11.1920 Chase, George Clinton and Mazzocco, Dante Chase Adding Machine Corporation : Zero-setting means for registers
- Patent:US1358263 09.11.1920 Ferdinand J. Tillman Typewriter Calculating Attachment Comp. : Calculating attachment for typewriting machines
- Patent:US1358427 09.11.1920 Andrew Ekman Accounting Machine Comp. : Adding machine
- Patent:US1358517 09.11.1920 James Clarence Burne Monroe Calculating Machine Comp. : Attachment to adding-machines
- Patent:US1359173 16.11.1920 Horton, Allen Burroughs Adding Machine Comp. : Adding machine
- Patent:US1359231 16.11.1920 Clifton B. Corell Underwood Elliott-Fisher Comp. : Combined typewriting and computing machine
- Patent:US1360004 23.11.1920 Gordon Monk, Sidney : Perpetual calendar
- Patent:US1360726 27.11.1920 Alfred Crook Philadelphia Roll und Machine Comp. : Variable statistical chart
- Patent:US1361542 07.12.1920 Odhner, Valentin Jakob : Calculating machine
- Patent:US1361791 07.12.1920 Fred M. Carroll Richard M. Blakely NCR : Sorting and accounting machine
- Patent:US1361949 14.12.1920 Duke Wittnebert : Adding and subtracting machine
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