Patente aus den USA 1921
- Patent:US1364154 04.01.1921 F. O. Stillman and H. M. Schleicher : Slide Rule
- Patent:US1364618 04.01.1921 Dennis, A.S. Marchant Calculating Machine Comp. : Transfer mechanism for calculating-machines
- Patent:US1371953 15.01.1921 Turck, Joseph Abraham Valentine Felt und Tarrant : Calculating Machine
- Patent:US1371954 15.01.1921 Turck, Joseph Abraham Valentine : Calculating Machine
- Patent:US1596108 15.01.1921 Kübler, Carl und Meuter, Otto : Calculating machine
- Patent:US1366566 25.01.1921 Hopkins, Hubert Moon-Hopkins Billing Machine Co. : Calculating-machine
- Patent:US1398945 29.01.1921 Rechnitzer, Alexander : Calculating Machine
- Patent:US1367053 01.02.1921 W. L. Jones : Perpetual Calendar
- Patent:US1367877 08.02.1921 Hopkins, William Wallace : Calculating-machine
- Patent:US1368424 15.02.1921 A. Briechle : Calculating Machine
- Patent:US1574249 17.02.1921 R. W. Hook : Adding Machine
- Patent:US1369065 22.02.1921 John Waldheim Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1369097 22.02.1921 Goldberg, Hyman Eli Goldberg Calculating Machine Co : Calculating-machine
- Patent:US1369145 22.02.1921 Thomas Edward G Toledo Scale Co : Price-calculating weighing-scale
- Patent:US1369415 22.02.1921 Frederick L. Fuller NCR : Cash-register
- Patent:US1369791 01.03.1921 Benjamin M. des Jardins Underwood Computing Machine Comp. : Computing machine
- Patent:US1369865 01.03.1921 Wilde, Noel : Perpetual calendar
- Patent:US1369958 01.03.1921 Blaustein, Joseph Controller Comp., Inc. : Calculating Machine
- Patent:US1370238 01.03.1921 Stickney, Burnham Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1370239 01.03.1921 Stickney, Burnham Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1370360 01.03.1921 Pitman, Henry L. Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1370426 01.03.1921 Louis E. Giles Underwood Computing Machine Comp. : Computing machine
- Patent:US1370427 01.03.1921 Gilles, Louis E. Underwood Computing Machine Comp. : Computing machine
- Patent:US1370428 01.03.1921 Louis E. Giles Underwood Computing Machine Comp. : Computing machine
- Patent:US1370475 01.03.1921 Carl E. Norin Underwood Computing Machine Comp. : Combined typewriting and computing-machine
- Patent:US1370493 01.03.1921 Blaustein, Joseph Controller Comp., Inc. : Calculating machine
- Patent:US1370499 01.03.1921 Gubelmann, William S. : Vertical Ruling Mechanism for Calculating and like Machines
- Patent:US1371138 08.03.1921 Joseph H. Bair Lewis H. Tylor James O. David William C. Haddock : Calculating-machine
- Patent:US1371526 15.03.1921 Martin Teetor Teetor Company : Calculating Machine
- Patent:US1371653 15.03.1921 von Pein, Edward NCR : Cash register
- Patent:US1372087 22.03.1921 F. A. Roddy : Apparatus for Illustrating and Demonstrating the Principles of Pure Arithmetic
- Patent:US1372334 22.03.1921 A. T. Brown : Computing Machine
- Patent:US1372748 29.03.1921 Gubelmann, William S. : Paper Supporting Mechanism for Recording Machines
- Patent:US1372965 29.03.1921 Lake, Clair Tabulating Machine Company : Electric transfer device
- Patent:US1373056 29.03.1921 Crowder Havy Q R : Ellipsograph
- Patent:US1374762 12.04.1921 Poole, Arthur Remington Accounting Machine Comp. : Calculating-machine
- Patent:USD57742 26.04.1921 Sundstrand, Gustaf David Rockford Milling Co : Design for a cash register
- Patent:US1376518 03.05.1921 Julius Duckstine Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1376555 03.05.1921 Lasker, William Walter Powers Accounting Machine Co. : Total taking means for accounting machines
- Patent:US1377269 10.05.1921 Odhner, Valentin Jakob : Transfer mechanism of calculating-machines
- Patent:US1377671 10.05.1921 C. F. Dieckmann Dietzgen : Process of Fastening Non-Metallic Elements to Metal
- Patent:US1378047 17.05.1921 Martin Olaf O Remington Accounting Machine C : Typewriting and calculating machine
- Patent:US1378666 17.05.1921 H. L. Eastman and F. B. Rae : Calculating Device
- Patent:US1378887 24.05.1921 Martin Jr Thomas Pugh : Paper-feed alarm for adding-machines
- Patent:US1378950 24.05.1921 Augustus D. Hargan Western Electric Comp. : Recording key
- Patent:US1378993 24.05.1921 Erich Böhnke : Slide Rule
- Patent:US1379268 24.05.1921 Lake, Clair Tabulating Machine Company : Printing tabulator
- Patent:US1379322 24.05.1921 Tillman, Ferdinand : Calculating attachment for type-writing machines
- Patent:US1380754 07.06.1921 J. P. Van Bogaert : Integraph and Differentiator
- Patent:US1380792 07.06.1921 Goldberg, Hyman Eli Remington Accounting Machine Comp. : Calculating machine
- Patent:US1381898 21.06.1921 Julius Andersson Wictor Oskar : Calculating Machine
- Patent:US1382011 21.06.1921 H. ONeill and S. H. Payne : Slide Rule
- Patent:US1382262 21.06.1921 R. M. Allen : Switching System and Indicating Device therefor
- Patent:US1382286 21.06.1921 Hart, Frederick Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1382331 21.06.1921 Thomas, James Morse Twist Drill und Machine Comp. : Computing device
- Patent:US1383227 28.06.1921 Harry S. Moir : Savings-bank interest-indicator
- Patent:US1383296 05.07.1921 Desire Giot Henri Louis Victor : Star-transit calculator and indicator for mariners
- Patent:US1383492 05.07.1921 Howard Seely Frank : Calculating Device
- Patent:US1383607 05.07.1921 A. S. Dennis : Calculating Machine
- Patent:US1383969 05.07.1921 G. E. Beggs : Aeroplane Bomb Sight
- Patent:US1384592 12.07.1921 Britten, Edwin Monroe Calculating Machine Comp. : Shock-absorber for calculating-machine carriages
- Patent:US1384632 12.07.1921 Phinney, Edgar Monroe Calculating Machine Comp. : Key lock for calculating machines
- Patent:US1384633 12.07.1921 Phinney, Edgar E. Monroe Calculating Machine Comp. : Reverse operation check for registers
- Patent:US1384634 12.07.1921 Phinney, Edgar Monroe Calculating Machine Comp. : Carriage-lock for Calculating-machines
- Patent:US1385292 19.07.1921 J. E. Whitaker : Counter
- Patent:US1385700 26.07.1921 Arthur S. Milinowski : Calculating machine
- Patent:US1386021 02.08.1921 Heber C. Peters Peters-Morse Mfg. Corp. : Adding machine
- Patent:US1386022 02.08.1921 Heber C. Peters Peters-Morce Mfg. Corp. : Adding-machine
- Patent:US1386758 09.08.1921 Charles Birth Wales Adding Machine Comp. : Calculating-machine
- Patent:US1386876 09.08.1921 J. J. Kerr : Planimeter Guide
- Patent:US1386953 09.08.1921 J. D. Robertson : Speedometer
- Patent:US1387267 09.08.1921 Christian Holle, Jr. : Magnifying attachment for slide-rules
- Patent:US1387551 16.08.1921 Meitner, Elemer Ford Instrument Comp., Inc. : Range-predicting apparatus
- Patent:US1387762 16.08.1921 T. Carrol and J. C. Lockyer : Perforating Mechanism for Cash Registers
- Patent:US1388218 23.08.1921 Edward Thomas Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1388257 23.08.1921 Hart, Frederick Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1388271 23.08.1921 Lasker, William Walter Powers Accounting Machine Comp. : Designation printing means
- Patent:US1388746 23.08.1921 Odhner, Valentin Jakob : Supporting means of the ten-pin, hundred-pin, etc., of the calculatingwheels in calculating-machines
- Patent:US1389232 30.08.1921 Lester A. Wernery Underwood Computing Machine Comp. : Combined typewriting and computing machine
- Patent:US1389559 30.08.1921 : Coding and decoding device
- Patent:US1390278 13.09.1921 Degener, Gustave O. Underwood Computing Machine Comp. : Computing-machine
- Patent:US1391072 20.09.1921 W. J. Pasinski : Adding Machine
- Patent:US1391220 20.09.1921 Turck, Joseph Abraham Valentine : Calculating Machine
- Patent:US1391319 20.09.1921 Karl Hoecken : Tens carrying mechanisms of computing machines
- Patent:US1391621 20.09.1921 F. H. Fenwirth : Extension Rule
- Patent:US1392578 04.10.1921 P. J. Jones : Educational Apparatus
- Patent:USD59381 11.10.1921 N. A. Shipherd : Computing apparatus
- Patent:US1394063 18.10.1921 Edgar Maynard Camp William D. Bleick : Dash-pot
- Patent:US1394256 18.10.1921 Fuller, Frederick NCR : Cash register
- Patent:US1394800 25.10.1921 F. J. Tillman : Calculating Machine
- Patent:US1395044 25.10.1921 Gooch, Claiborne Burroughs Adding Machine Comp. : Adding machine
- Patent:US1395121 25.10.1921 Landsiedel, Harry Dalton Adding Machine Comp. : Recording machine
- Patent:US1395310 01.11.1921 F. H. Thompson : Last Measuring Machine
- Patent:US1395991 01.11.1921 Malcolm F. Gascon Burroughs Adding Machine Comp. : Adding machine
- Patent:US1396326 08.11.1921 Goldberg, Hyman Eli Remington Accounting Machine Comp. : Calculating machine
- Patent:US1396612 08.11.1921 White, Nelson Monroe Calculating Machine Comp. : Zero setting mechanism
- Patent:US1396662 08.11.1921 E. E. Phinney : Calculating Machine
- Patent:US1396663 08.11.1921 Phinney, Edgar Monroe Calculating Machine Comp. : Crank-handle latch
- Patent:US1396932 15.11.1921 A. H. Hawley : Accounting Machine with Auxiliary Printing Appliance
- Patent:US1397188 15.11.1921 Wahl, John C. : Calculating Machine
- Patent:US1397596 22.11.1921 Henry Muller : Calculating device
- Patent:US1397774 22.11.1921 Muller, Robert : Adding Machine
- Patent:US1397944 22.11.1921 Thomas J. Dalzell : Calculating device
- Patent:US1398068 22.11.1921 Doerr, Fred : Computing Machine
- Patent:US1398074 22.11.1921 Goldberg, Hyman Eli (Now by judicial Change of Name H. Golber) : Algebraic Total Calculating Machine
- Patent:US1398576 22.11.1921 Shipley, Bernis : Cash Register
- Patent:US1398914 29.11.1921 Pierce Robert A : Slide-rule
- Patent:US1399450 06.12.1921 Trinks, Franz : Paper-strip feed for adding-machines
- Patent:US1399652 06.12.1921 E. E. Phinney : Setting up Means for Calculating Machines
- Patent:US1400004 13.12.1921 Schaller, Carl Grimme, Natalis u. Co. : Calculating machine
- Patent:US1400105 13.12.1921 Trinks, Franz : Calculating Machine
- Patent:US1400106 13.12.1921 Trinks, Franz : Adding Machine
- Patent:US1400197 13.12.1921 Andrew C. Wood Stewart-Warner Speedometer Corp. : Revolution-counter resetting
- Patent:US1400363 13.12.1921 M. B. And V. C. Kennedy : Computing Machine
- Patent:US1400842 20.12.1921 Harry H. Vickers Underwood Computing Machine Comp. : Combined typewriting- and computing machine
- Patent:US1401225 27.12.1921 Oscar Woodward Remington Accounting Machine Comp. : Computing-machine
- Patent:US1401692 27.12.1921 W. E. Harris : Calculating Device
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