Number    Date    Title/Comments
------- ---------- ---------------------------------------------
 366945 07-19-1887 adding machine (original patent)
 371496 10-11-1887 adding machine
 396034 01-08-1889
 405024 06-11-1889 Comptograph**
 441232 11-25-1890    "
 .....3     "         "
 465255 12-15-1891    "
 568020 09-22-1896    "
 .....1     "         "
 628176 07-04-1899    "
 644287 02-27-1900    "
 661121 11-06-1900    "
 671109 04-02-1901 "British money" claims only
 693958 02-25-1902 Comptograph**
 694955 03-11-1902    "
 711487 10-21-1902    "
 733379 07-14-1903 famous "case design" patent
 749177 01-12-1904 Comptograph**
 762520 06-14-1904
 .....1     "
 767107 08-09-1904
 780271 01-17-1905
 .....2     "
 .....3     "
 789099 05-02-1905 printing machine patent by H.H.Lockwood
 853543 05-14-1907
 889671 06-02-1908
 ?????? 07-14-1908
 960528 06-07-1910
 982416 01-24-1911 oblong keytops with metal side plates
 982417 01-24-1911 improvements on 982416
 992950 05-23-1911 first "Controlled Key" patent
 996009 06-20-1911
1003723 09-19-1911
1028344 06-04-1912
1066096 07-01-1913
1072933 09-09-1913 
......4     "      Issued to D.E.Felt & J.A.V.Turck, assignors to F&T
1074689 10-07-1913 Issued to Geo S. Bollensen, assignor to F&T
1074704 10-07-1913
......5     "
1088219 02-24-1914
1110734 09-15-1914 Issued to Kurt F. Ziehm, assignor to F&T
1357747 11-02-1920 Issued to J.A.V.Turck, assignor to F&T
......8     "         " 
1371953 03-15-1921 Issued to J.A.V.Turck, assignor to F&T ("power driven")
1391220 09-20-1921 Issued to J.A.V.Turck, assignor to F&T (SuperTotalizer)
1886883 11-08-1932 Issued to W.S.Johnson of Providence, RI (filed 4-23-21)


* Unless otherwise notated, all patents issued to Dorr E. Felt solely
** Comptograph (Comptometer with printing device).
*** Patent# unknown; date appears on some Patent plates.