Patent
Suchergebnisse für: FELT UND TARRANT
 
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Patent:CA148803 
24.06.1913 Felt, Dorr E. (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [133.31%]
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Patent:CA152140 
02.12.1913 Felt, Dorr E. (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [133.31%]
 - 
Patent:CA207974 
25.01.1921 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
 - 
Patent:CA207975 
25.01.1921 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA211237 
03.05.1921 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA217678 
11.04.1922 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA217679 
11.04.1922 J. A. V. Truck Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [126.32%]
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Patent:CA287888 
12.03.1929 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA29468 
07.08.1888 Felt, Dorr E. (P), Robert Tarrant   : Adding machine [91.85%]
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Patent:CA314596 
25.08.1931 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA333402 
20.06.1933 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Key-responsive calculating machine [130.94%]
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Patent:CA345994 
13.11.1934 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Motor governor [130.94%]
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Patent:CA356931 
31.03.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine idle lock [131.06%]
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Patent:CA356932 
31.03.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine keyboard [130.94%]
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Patent:CA361244 
20.10.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA364747 
16.03.1937 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.54%]
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Patent:CA370388 
07.12.1937 Turck, Joseph Abraham Valentine (P),  Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [130.95%]
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Patent:CA370389 
07.12.1937 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [129.75%]
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Patent:CA374394 
14.06.1938 Niemann, Frederick (P) Adolph, Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [130.95%]
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Patent:CA383566 
22.08.1939 Turck, Joseph Abraham Valentine (P), Ben C. Clevenger Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [130.94%]
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Patent:CA405497 
16.06.1942 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Numeral wheel [130.54%]
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Patent:CA406222 
21.07.1942 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [129.75%]
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Patent:CA407984 
13.10.1942 Haldon A. Leedy Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Business machine [129.75%]
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Patent:CA412271 
04.05.1943 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [129.75%]
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Patent:CA413205 
15.06.1943 Haldon A. Leedy Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Business machine [128.42%]
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Patent:CA413985 
20.07.1943 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [129.75%]
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Patent:CA417395 
28.12.1943 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Calculating machine [129.75%]
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Patent:CA424672 
26.12.1944 Laiho, Jalmer (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [128.42%]
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Patent:CA443063 
22.07.1947 Laiho, Jalmer (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [128.42%]
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Patent:CA447693 
06.04.1948 Niemann, Frederick (P) Adolph Felt und Tarrant (P) Felt & Tarrant Manif. Co. : Actuator button [129.75%]
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Patent:CA465348 
23.05.1950 Laiho, Jalmer (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [128.42%]
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Patent:CA465848 
13.06.1950 Laiho, Jalmer (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Calculating machine [128.42%]
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Patent:CA490637 
17.02.1953 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Key-driven calculating machine [130.94%]
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Patent:CA535484 
08.01.1957 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Key-driven calculating machine [130.94%]
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Patent:CA541168 
21.05.1957 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Felt & Tarrant Manif. Co.
 : Key responsive calculating machine for positive and negative forms of calculation [130.29%]
 
 
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Patent:CH275190 
15.05.1951   : Machine à calculer électrique [4.65%]
 - 
Patent:CH89253 
02.05.1921   : Porte-copie de machine à écrire, à additionner etc. [13.74%]
 
 
 
 
 
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Patent:GB148292 
09.01.1922 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Improvements in or connected with Calculating machines [82.94%]
 - 
Patent:GB154603 
27.03.1922 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) :  [89.26%]
 - 
Patent:GB181043 
06.06.1922  Felt und Tarrant (P) : Improvements in Calculating Machines [111.15%]
 - 
Patent:GB189620990 
18.12.1897 Felt, Dorr E. (P) und Tarrant, Robert (P)  : Improved Adding and Printing Machine [88.98%]
 - 
Patent:GB190413094 
28.07.1904 Lake, Henry Harris (P)  : Improvements in or relating to Calculating Machines [55.14%]
 - 
Patent:GB190905387 
06.06.1910 Felt, Dorr E. (P)  : Improvements in Calculating Machines [46.49%]
 - 
Patent:GB190909509 
21.04.1910 Felt, Dorr E. (P)  : Improvements relating to Calculating Machines [47.90%]
 - 
Patent:GB190925766 
15.09.1910 Felt, Dorr E. (P)  : Improvements relating to Calculating Machines [45.59%]
 - 
Patent:GB191001622 
13.10.1910 Felt, Dorr E. (P)  : Calculating Machine [49.40%]
 - 
Patent:GB191226772 
26.11.1913 Felt, Dorr E. (P)  : Improvements in and relating to Calculating Machines [41.75%]
 - 
Patent:GB191316036 
11.09.1914 Felt, Dorr E. (P)  : Improvements in and relating to Calculating Machines [40.29%]
 - 
Patent:GB207070 
22.11.1923  Felt und Tarrant (P) :  [94.09%]
 - 
Patent:GB230199 
12.03.1925 Frederick William Henning  : Improvements in and relating to calculating apparatus [10.31%]
 - 
Patent:GB310362 
26.09.1929  Rheinmetall (P) (Rheinische Metallwaaren und Maschinenfabrik) : Combination of a calculating machine for all four rules with a card perforating machine [21.10%]
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Patent:GB331543 
04.07.1930 Cornelis Hendricus Stuivenberg  : Improvements in record-card-controlled adding and printing machines [23.29%]
 - 
Patent:GB341435 
09.01.1931  Felt und Tarrant (P) :  [88.60%]
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Patent:GB344868 
09.03.1931  Felt und Tarrant (P) Mfg. Comp. : Key-responsive calculating machines [90.87%]
 - 
Patent:GB383250 
24.08.1932  Brunsviga (P) : Improvements in and relating to Calculating Machines [26.33%]
 - 
Patent:GB511898 
25.08.1939 Heinrich Schmitt  : Improvements in typewriters, calculating machines and like office machines [9.01%]
 - 
Patent:GB551707 
05.03.1943  Felt und Tarrant (P) : Improvements in or relating to numeral wheels or the like [92.06%]
 - 
Patent:GB551994 
18.03.1943  Felt und Tarrant (P) :  [69.12%]
 - 
Patent:GB553198 
12.05.1943  Felt und Tarrant (P) :  [84.78%]
 - 
Patent:GB556239 
27.09.1943  Felt und Tarrant (P) :  [92.70%]
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Patent:GB566376 
16.09.1942  Felt und Tarrant (P) : Calculating-machine [87.18%]
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Patent:GB575332 
13.02.1946 Alfred Wilson Sinclair Fraser and Glass Ltd : Improvements in or relating to Slide Rules or calculators [10.67%]
 - 
Patent:GB580252 
02.09.1946 Dora Minna Liebmann und Gerhard Liebmann  : Improvements in or relating to calculating instruments [24.49%]
 - 
Patent:GB600485 
22.06.1945 Stevens, A. H. Felt und Tarrant (P) : Improvements in or Relating to Calculating Machines [98.03%]
 - 
Patent:GB601375 
23.07.1943  Felt und Tarrant (P) : Improvements in or Relating to Calculating Machines [84.26%]
 - 
Patent:GB601427 
05.05.1948  Felt und Tarrant (P) : Improvements in or relating to Calculating Machines [90.05%]
 - 
Patent:GB640347 
19.07.1950  Felt und Tarrant (P) :  [90.50%]
 - 
Patent:GB640445 
19.07.1950  Felt und Tarrant (P) :  [19.90%]
 - 
Patent:GB650728 
28.02.1951  Felt und Tarrant (P) : Improvements in or relating to finger-operable actuator buttons for calculating machines, typewriters and other office machines [31.09%]
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Patent:GB712749 
28.07.1954 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Improvements in or relating to calculating machines [19.17%]
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Patent:GB712750 
28.07.1954 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Improvements in or relating to calculating machines [84.53%]
 - 
Patent:GB752591 
11.07.1956  Felt und Tarrant (P) : Improvements in or relating to calculating machines [89.08%]
 - 
Patent:GB771816 
03.04.1957  Felt und Tarrant (P) : Improvements in or relating to calculating machines [90.29%]
 
 
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Patent:US1003723 
19.09.1911 Felt, Dorr E. (P)  : Key Action for Calculating Machines [24.07%]
 - 
Patent:US1028344 
04.06.1912 Felt, Dorr E. (P)  : Calculating Machine [25.01%]
 - 
Patent:US1066096 
01.07.1913 Felt, Dorr E. (P)  : Calculating Machine [25.99%]
 - 
Patent:US1072933 
09.09.1913 Felt, Dorr E. (P)  : Calculating Machine [31.39%]
 - 
Patent:US1072934 
09.01.1913 Felt, Dorr E. (P) & Turck, Joseph Abraham Valentine (P)  : Calculating Machine [36.90%]
 - 
Patent:US1074689 
07.10.1913 G. S. Bollensen  : Adding Machine [19.49%]
 - 
Patent:US1074704 
07.10.1913 Felt, Dorr E. (P)  : Calculating Machine [29.41%]
 - 
Patent:US1074705 
07.10.1913 Felt, Dorr E. (P)  : Calculating Machine [9.30%]
 - 
Patent:US1088219 
24.02.1914 Felt, Dorr E. (P) Felt und Tarrant (P) : Calculating Machine [34.30%]
 - 
Patent:US1110734 
15.09.1914 K. F. Ziehm Felt und Tarrant (P) : Calculating Machine [30.69%]
 - 
Patent:US1119395 
01.12.1914 J. H. Brady  : Computing Measure [8.15%]
 - 
Patent:US1154897 
28.01.1915 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [5.81%]
 - 
Patent:US1198820 
19.09.1916 L. S. Burridge  : Adding and Recording Machine [9.45%]
 - 
Patent:US1333277 
09.03.1920 Niemann, Frederick (P) Adolph Felt und Tarrant (P) : Printing cut-out for adding-machines [20.50%]
 - 
Patent:US1357747 
02.01.1920 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [28.44%]
 - 
Patent:US1357748 
02.11.1920 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [19.92%]
 - 
Patent:US1371953 
15.01.1921 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Calculating Machine [35.57%]
 - 
Patent:US1391220 
20.09.1921 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [28.10%]
 - 
Patent:US1458457 
12.06.1923 Frederic Amez-Droz Louis  : Copy carrier for writing machines, adding machines, and the like [11.36%]
 - 
Patent:US1480259 
08.01.1924 Greiner Louis C  : Cabinet for calculating machines [6.54%]
 - 
Patent:US1512281 
21.10.1924 Fisher Francis K  : Truck for calculating and other machines [7.56%]
 - 
Patent:US1612969 
04.01.1927 Felt, Dorr E. (P) et al  : Calculating Machine [34.72%]
 - 
Patent:US1714964 
28.05.1929 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [9.73%]
 - 
Patent:US1751609 
25.03.1930 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [5.67%]
 - 
Patent:US1818425 
11.08.1931 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Co. : Calculating machine [90.87%]
 - 
Patent:US1840378 
12.01.1932 C. Wittenmyer Felt und Tarrant (P) : Calculating Machine [28.11%]
 - 
Patent:US1840424 
12.01.1932 Wittenmyer, Carlos (P)  : Calculating Machine [5.74%]
 - 
Patent:US1869872 
02.08.1932 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [11.22%]
 - 
Patent:US1870699 
09.08.1932 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [5.69%]
 - 
Patent:US1884814 
13.05.1931 Niemann, Frederick; Ziehm, Kurt F. Felt und Tarrant (P) : Device for distribution of accounts [88.06%]
 - 
Patent:US1900757 
07.03.1933 E. H. Corlett  : Measuring and Computing Instrument [6.33%]
 - 
Patent:US1902597 
21.03.1933 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [10.54%]
 - 
Patent:US1902598 
21.03.1933 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [30.13%]
 - 
Patent:US1905579 
25.04.1933 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [9.53%]
 - 
Patent:US1926827 
12.09.1933 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [18.30%]
 - 
Patent:US1927856 
26.09.1933 Ferris Roy (P), Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Calculating Machine [22.40%]
 - 
Patent:US1942106 
02.01.1934 Kottmann, August (P) Rheinmetall (P) (Rheinische Metallwaaren und Maschinenfabrik) : Total Printing Device [6.09%]
 - 
Patent:US2020975 
12.11.1935 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [21.08%]
 - 
Patent:US2021393 
19.11.1935 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [21.81%]
 - 
Patent:US2033147 
07.02.1934 Niemann, Frederick Felt und Tarrant (P) : Device for distribution of accounts [89.91%]
 - 
Patent:US2043021 
02.06.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Mfg. Comp. : Keyboard for calculating machines and the like [86.28%]
 - 
Patent:US2060702 
10.11.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Calculating Machine [20.78%]
 - 
Patent:US2060704 
10.11.1936 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Mfg. Comp. : Calculating Machine [87.16%]
 - 
Patent:US2063962 
15.12.1936 Turck, Joseph Abraham Valentine (P)  : Key Responsive Calculating Machine [36.66%]
 - 
Patent:US2075375 
30.03.1937 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [11.36%]
 - 
Patent:US2088004 
27.07.1937 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Motor Governor [33.01%]
 - 
Patent:US2104051 
04.01.1938 Niemann, Frederick (P) Adolph  : Calculating Machine [21.07%]
 - 
Patent:US2130364 
20.09.1938 Niemann, Frederick (P) Adolph et al  : Calculating Machine [29.29%]
 - 
Patent:US2149817 
07.03.1939 Niemann, Frederick (P) Adolph et al  : Calculating Machine [26.81%]
 - 
Patent:US2224203 
10.01.1940 Turck, Joseph Abraham Valentine (P) et al  : Locking Mechanism for Calculating Machine [12.76%]
 - 
Patent:US2266275 
16.12.1941 Hugo Schuler Wanderer (P) Werke Ag : Platen for typewriters, adding machines, and the like [7.22%]
 - 
Patent:US2273491 
17.02.1942 H. A. Leedy  : Business Machine [11.89%]
 - 
Patent:US2273857 
24.02.1942 Friden, Carl Mauritz Fredrick (P) Friden (P) : Calculating Machine [16.82%]
 - 
Patent:US2278183 
31.03.1942 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Calculating machine [89.91%]
 - 
Patent:US2278405 
31.03.1942 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Calculating machine casing [88.98%]
 - 
Patent:US2279054 
07.04.1942 Niemann, Frederick (P) Adolph  : Calculating Machine [14.81%]
 - 
Patent:US2279337 
14.04.1942 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Numeral wheel [89.91%]
 - 
Patent:US2287151 
23.06.1942 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [5.35%]
 - 
Patent:US2315464 
30.03.1943 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) Mfg. Comp. : Calculating machine [87.16%]
 - 
Patent:US2346601 
11.04.1944 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Calculating machine [89.91%]
 - 
Patent:US2381788 
07.08.1945 Turck, Joseph Abraham Valentine (P)  : Carry Foil Mechanism [15.56%]
 - 
Patent:US2402569 
25.06.1946 Niemann, Frederick (P) Adolph Felt und Tarrant (P) : Key responsive calculating machine [24.28%]
 - 
Patent:US2430574 
11.11.1947 Laiho, Jalmer (P)  : Calculating Machine [21.66%]
 - 
Patent:US2430575 
11.11.1947 Laiho, Jalmer (P)  : Key-Responsive Calculating Machine [12.16%]
 - 
Patent:US2451842 
19.10.1948 Liebmann, D. M. (P) et al  : Calculating Instrument [10.05%]
 - 
Patent:US2472519 
07.01.1949 Carlsen, J. (P)  : Key-Operated Differential Actuator [10.23%]
 - 
Patent:US2485213 
18.10.1949 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Actuator button [89.91%]
 - 
Patent:US2531089 
21.01.1950 Turck, Joseph Abraham Valentine (P)  : Calculating Machine [11.51%]
 - 
Patent:US2570068 
02.10.1951 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Keyboard interlock for calculating machines [88.06%]
 - 
Patent:US2585578 
12.02.1952 Niemann, Frederick (P) Felt und Tarrant (P) Mfg. Comp. : Decimal indicator [89.91%]
 - 
Patent:US2588127 
04.03.1952 Jalmer M. Laiho Felt und Tarrant (P) Mfg. Comp. : Interlock for calculating machine control keys [86.28%]
 - 
Patent:US2599257 
03.06.1952 Heitlinger, Eugene (P) Felt und Tarrant (P) Mfg. Comp. : Split accumulator mechanism [87.16%]
 - 
Patent:US2612316 
30.09.1952 Caldwell Frederic B  : Meteorological calculating mechanism [5.05%]
 - 
Patent:US2628026 
10.01.1953 Turck, Joseph Abraham Valentine (P)  : Key-Driven Calculating Machine [11.47%]
 - 
Patent:US2643058 
23.06.1953 Quillinan, M. J. (P)  : Slide Rule [9.17%]
 - 
Patent:US2656110 
20.10.1953 Niemann, Frederick (P) Adolph  : Split Clearing Mechanism [21.64%]
 - 
Patent:US2659533 
17.11.1953 Quinby, E. J. (P) et al  : Touch-Responsive Keyboard [9.66%]
 - 
Patent:US2677181 
04.05.1954 Sury, F. P. (P)  : Pipe Marking Device [7.49%]
 - 
Patent:US2682028 
22.06.1954 Laiho, Jalmer (P) Felt und Tarrant (P) : Time Switch for Motors [34.02%]
 - 
Patent:US2682371 
29.06.1954 Benninger, Ernst (P)  : Pin Carriage Shifting Mechanism for Ten-Key Multiplying Machines [10.56%]
 - 
Patent:US2725194 
29.11.1955 Krauss, D. G. (P)  : Fuel Milleage Calculator [6.08%]
 - 
Patent:US2729393 
03.01.1956 Heitlinger, Eugene (P) Felt und Tarrant (P) Mfg. Comp. : Zeroizing control mechanism [88.06%]
 - 
Patent:US2734683 
14.01.1956 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Total Transfer Mechanism [37.20%]
 - 
Patent:US2753117 
03.07.1956 Walker, E. C. (P) Felt und Tarrant (P) : Mechanism for Adjusting the Resistance to Key Depressions in Calculating Machines [33.88%]
 - 
Patent:US2759671 
21.01.1956 Turck, Joseph Abraham Valentine (P) Felt und Tarrant (P) : Key-Responsive Adding and Subtracting Calculating Machine [23.95%]
 - 
Patent:US2778569 
22.01.1957 Lawrence W. Brugman Raymond F. Koch Felt und Tarrant (P) Mfg. Comp. : Split clearing mechanism [86.28%]
 - 
Patent:US2779538 
29.01.1957 W. M. Shanhouse  : Navigational Relative Motion Computer [5.06%]
 - 
Patent:US2793808 
28.05.1957 J. T. Zak  : Rectilinear Slide Rules [5.70%]
 - 
Patent:US2926843 
01.03.1960 G. A. Francis et al  : Nomographic Device for Determining the Length of Coiled Material [5.59%]
 - 
Patent:US3008677 
14.11.1961 Grove William A Reno Ralph B : Holder for Slide Rule [6.91%]
 - 
Patent:US3019973 
06.02.1962 C. H. Blackerby  : Slide Rule [7.94%]
 - 
Patent:US3022002 
20.02.1962 L. W. Dixon  : Parallel Rule - Slide Rule [6.65%]
 - 
Patent:US3026031 
20.03.1962 Jones Ragon E  : Calculator for determining heating and cooling requirements [6.27%]
 - 
Patent:US3036762 
29.05.1962 C. G. McDonough  : Trip Speed Averager [5.53%]
 - 
Patent:US3053452 
11.09.1962 George Edwards David Beverley, Tom Kilburn  : Adding/subtracting circuits for digital electronic computers [11.89%]
 - 
Patent:US3055584 
25.09.1962 Maier, Elmar (P) Contina (P) : Calculating Machine [5.29%]
 - 
Patent:US3095751 
02.07.1963 A. W. Enslein  : High Ratio Double Action Stepper Unit [6.25%]
 - 
Patent:US3181787 
04.05.1965 R. W. Burns  : Wall Construction Computer Device [12.04%]
 - 
Patent:US3261548 
19.07.1966 Udo Riehle  : Writing implement with Slide Rule [5.64%]
 - 
Patent:US3419972 
07.01.1969 J. A. Kitzinger  : Educational Aid ... [5.09%]
 - 
Patent:US366945 
19.07.1887 Felt, Dorr E. (P)  : Adding Machine [26.89%]
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Patent:US3696994 
10.10.1972 Burkhardt, Gottfried (P) Diehl (P) : Calculating Mechanism For Ten Keys - Four Species - Calculating Machines [10.07%]
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Patent:US371496 
11.01.1887 Felt, Dorr E. (P)  : Adding Machine [27.83%]
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Patent:US396034 
08.01.1889 Felt, Dorr E. (P)  : Adding Machine [31.98%]
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Patent:US405024 
11.06.1889 Felt, Dorr E. (P)  : Adding Machine [42.60%]
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Patent:US441232 
25.01.1890 Felt, Dorr E. (P)  : Type Writing Machine [29.64%]
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Patent:US441233 
25.11.1890 Felt, Dorr E. (P)  : Adding and Recording Machine [43.42%]
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Patent:US465255 
15.12.1891 Felt, Dorr E. (P)  : Recording Computing Machine [28.65%]
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Patent:US553331 
21.01.1896 L. S. Burridge & N. R. Marshman  : Adding and Recording Machine [5.72%]
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Patent:US568020 
22.09.1896 Felt, Dorr E. (P) Felt und Tarrant (P) : computing machine [35.56%]
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Patent:US568021 
22.09.1896 Felt, Dorr E. (P)  : Printing and Calculating Machine [27.75%]
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Patent:US590972 
00.07.1989 Felt, Dorr E. (P)  : Duplicate-printing mechanism for adding-machines [42.50%]
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Patent:US628176 
04.07.1899 Felt, Dorr E. (P)  : Tabulating Machine [30.76%]
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Patent:US644287 
27.02.1900 Felt, Dorr E. (P)  : Tabulating Machine [32.63%]
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Patent:US6551110 
22.04.2003 Hastie, Patricia Catherine (P)  : Visual educational device for teaching literacy [10.08%]
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Patent:US661121 
06.11.1900 Felt, Dorr E. (P)  : Calculating Machine [35.48%]
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Patent:US671109 
02.04.1901 Felt, Dorr E. (P)  : Calculating Machine [28.88%]
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Patent:US693958 
25.02.1902 Felt, Dorr E. (P)  : Duplicate Printing Mechanism for Adding Machines [30.18%]
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Patent:US694955 
11.03.1902 Felt, Dorr E. (P)  : Tabulating Machine [32.10%]
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Patent:US711487 
21.10.1902 Felt, Dorr E. (P)  : Tabulating Machine [27.99%]
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Patent:US733379 
14.07.1903 Felt, Dorr E. (P)  : Casing for Key Operated Machines [24.99%]
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Patent:US749177 
12.01.1904 Felt, Dorr E. (P)  : Calculating Machine [29.66%]
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Patent:US762520 
14.06.1904 Felt, Dorr E. (P) Felt und Tarrant (P) : Calculating Machine [40.03%]
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Patent:US762521 
14.06.1904 Felt, Dorr E. (P)  : Registering Mechanism for Calculating Machines [26.97%]
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Patent:US767107 
09.08.1904 Felt, Dorr E. (P)  : Canceling Mechanism for Calculators [28.34%]
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Patent:US780271 
17.01.1905 Felt, Dorr E. (P)  : Combined Tabulating and Writing Machine [29.25%]
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Patent:US780272 
17.01.1905 Felt, Dorr E. (P)  : Tabulating Machine [30.11%]
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Patent:US780273 
17.01.1905 Felt, Dorr E. (P)  : Tabulating Machine [23.25%]
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Patent:US853543 
14.05.1907 Felt, Dorr E. (P) & Wetmore, Charles (P)  : Tabulating Machine [33.33%]
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Patent:US889671 
02.06.1908 Felt, Dorr E. (P) & Wetmore, Charles (P)  : Total Printing Mechanism for Listing Machines [32.45%]
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Patent:US937863 
26.10.1909 R. J. Roberts  : Flexible Slide Rule [10.36%]
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Patent:US939221 
09.11.1909 J. M. Daly  : Computing Machine [6.05%]
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Patent:US956688 
03.05.1910 J. M. Daly  : Tonnage Equating Machine [6.14%]
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Patent:US960528 
07.06.1910 Felt, Dorr E. (P)  : Calculating Machine [30.65%]
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Patent:US982416 
24.01.1911 Felt, Dorr E. (P)  : Key for Keyboard Calculating Machine [21.34%]
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Patent:US982417 
24.01.1911 Felt, Dorr E. (P)  : Key for Keyboard Machine [20.23%]
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Patent:US982876 
31.01.1911 G. W. Richardson  : Slide Rule [5.48%]
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Patent:US992950 
23.05.1911 Felt, Dorr E. (P) Felt und Tarrant (P) : Calculating Machine [44.47%]
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Patent:US996009 
20.06.1911 Felt, Dorr E. (P)  : Calculating Machine [23.07%]
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Patent:US997986 
18.07.1911 L. T. Freeman  : Educational Appliance [19.77%]
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Patent:USD113817 
14.03.1939 Niemann, Frederick (P) Adolph et al Comptometer (P) : Calculating Machine [36.27%]
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Patent:USD178150 
26.06.1956 A. K. Ruddell  : Arithmetic Teaching Aid [24.65%]