Shoebox Comptometers - The Patents


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.



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