The table following summarises the main US patents issued for the Victor adding machines. A longer but still incomplete list is appended below. The lists are sorted by date of application to show the sequence of development. The "Description" column is my interpretation of the main contents of the patent, rather than the actual (and usually uninformative) title.
The patents can be downloaded free of charge via the search form at the US Patents Office.
| Number | Inventor | Date Filed | Description of contents |
| 1336840 | Johantgen | Jan 4 1918 | Describes the basic adding and listing mechanisms of the Johantgen 100 and 200-series machines. |
| 1810213 | Johantgen | Jul 5 1927 | Describes the direct subtraction mechanism of the 300-series machines. |
| 2281851 | Mehan | Feb 1 1937 | While primarily concerned with a printing mechanism with rotating typewheels, this patent also introduces the concentric-sector tens transfer mechanism that was to be used in various forms in the Mehan Victor machines. The patent was filed a year before Mehan joined Victor in 1938. |
| 2475510 | Mehan | Jul 4 1939 | The first Mehan Victor. The rotating print wheels of the 1937 machine have been replaced with a simpler rocking-platen print mechanism, with the type carriers incorporated into the large concentric carry discs. |
| 2635812 | Mehan | Jul 4 1939 | Provides an early reset of the tens transfer mechanism, so as to eliminate the blank stroke before taking a total. |
| 2486959 | Mehan | Jan 15 1940 | Develops the previous design to allow the machine to be built with either a full keyboard or ten-key keypad, using the same basic mechanism, controls, and casing. |
| 2411050 | Mehan | Dec 23 1940 | Further development to provide direct subtraction. The expanded mechanism is raised at an angle inside the casing, with the complementary accumulators mounted under the sloping baseplate. |
| 2550581 | Mehan | Apr 22 1948 | Adds a credit balance mechanism to provide true negative totals. |
| 2731206 | Lippert/Schultz | Sep 20 1951 | Adds push-button function keys and control mechanisms (Custom series). |
| 2834542 | Sundstrand | Jan 14 1954 | The first of several 60-page patents describing Sundstrand's automatic controls for the Victor machine. |
| 3476313 | Sundstrand | Jul 26 1967 | The final Sundstrand Victor with short-cut multiplication. |
Number Description of contents Inventor Date Filed Date Issued Pages ====== ======================= ======== ========== =========== ===== 1301941 Ten-key add-list machine Johantgen May 29 1916 Apr 29 1919 14 1301942 Paper carrriage for ten-key m/c Johantgen May 29 1916 Apr 29 1919 9 1301943 Register mechanism Johantgen May 29 1916 Apr 29 1919 7 1306112 Accumulator & carry mech Johantgen May 16 1917 Jun 10 1919 14 1336840 Adding and listing m/c Johantgen Jan 4 1918 Apr 13 1920 28 1378119 Rack bar and bearing Johantgen Jan 4 1918 May 17 1921 4 1396215 Clear-signal printing mech Johantgen Jan 4 1918 Nov 8 1921 7 1580492 Non-add and total mech Johantgen Sep 25 1922 Apr 13 1926 5 1569188 Accumulator and carry mech Johantgen Apr 2 1925 Jun 12 1926 6 1757669 Flexible handle connection Johantgen Sep 25 1922 May 6 1930 6 1788916 Ident characters in left cols Johantgen Sep 25 1922 Jan 13 1931 5 1816014 Dual-accumulator printing calc Johantgen Apr 27 1925 Jul 28 1931 18 1810213 Adding and subtracting m/c Johantgen Jul 5 1927 Jun 16 1931 13 1876056 Paper feeding mechanism Johantgen Sep 23 1929 Sep 6 1932 14 1876057 Item counting mechanism Johantgen Sep 23 1929 Sep 6 1932 14 2017641 Motor control and overload Uhlig Dec 20 1933 Oct 15 1935 14 2091778 Keyboard construction Garbell Mar 24 1934 Aug 31 1937 14 2212639 Tens transfer mechanism Garbell Mar 24 1934 Aug 27 1940 15 2242908 Adding & listing m/c Garbell Mar 24 1934 May 20 1941 37 2149371 Motor control mechanism Uhlig Aug 17 1936 Mar 7 1939 8 2281851 Printing mechanism Mehan Feb 1 1937 May 5 1942 9 D105944 Calc m/c full kbd add-list Garbell Apr 2 1937 Sep 7 1937 2 D105945 Adding m/c full kbd add-list Garbell Apr 2 1937 Sep 7 1937 2 2211891 Tens transfer on subtraction Garbell Apr 3 1937 Aug 20 1940 14 D105946 Calc m/c full kbd add-list Garbell Apr 17 1937 Sep 7 1937 2 D105946 Calc m/c full kbd add-list electric Garbell Apr 17 1937 Sep 7 1937 2 2277498 Accumulator actuating mechanism Mehan Jun 17 1937 Mar 24 1942 3 2352279 Detachable paper spool mounting Mehan May 25 1939 Jun 27 1944 4 D119624 Adding m/c casing (small manual) Kropp Jun 30 1939 Mar 26 1940 2 2475510 Total taking control Mehan Jul 4 1939 Jul 5 1949 10 2635812 Early carry reset (no blank stroke) Mehan Jul 4 1939 Apr 21 1953 5 2264949 Motor drive mechanism Mehan Jan 5 1940 Dec 2 1941 5 2270460 Friction governor for manual m/c Mehan Jan 5 1940 Jan 20 1942 5 2377707 Control switch mechanism Mehan Oct 1 1940 Jun 5 1945 9 2411050 Compact add/sub mechanism Mehan Dec 23 1940 Nov 12 1946 18 D129415 Adding m/c casing (larger manual) Kropp Dec 23 1940 Sep 9 1941 2 2346265 Split printing mechanism Mehan Dec 30 1940 Apr 11 1944 11 2360005 Unified key-set control mechanism Mehan Dec 30 1940 Oct 10 1944 21 2318000 Rocking platen mechanism Lippert Mar 14 1941 May 4 1943 6 D130070 Adding m/c small ten-key printing Kropp Jun 25 1941 Oct 21 1941 2 2311928 Roller feet for base BuehlerR Jul 10 1941 Feb 23 1943 3 2379449 Multiplying m/c (dual ten-key) Mehan/Hooe Jul 31 1941 Jul 3 1945 32 2361260 Printing mechanism BuehlerR Sep 13 1941 Oct 24 1944 8 2362709 Hand/motor drive for portable m/c Mehan Nov 21 1941 Nov 14 1944 10 2396188 Improved mechanism (e/mag control) Mehan/Hooe Mar 6 1942 Mar 5 1946 17 2429522 Tens transfer mechanism Mehan/Hooe Mar 6 1942 Oct 21 1947 13 2486959 Compact ten-key or full kbd m/c Mehan Jan 15 1940 Nov 1 1949 30 2497784 Remote control mechanism Mehan/Hooe May 15 1944 Feb 14 1950 23 D144778 Comp m/c full kbd printing Garbell Jul 30 1945 May 21 1946 2 D146027 Card punching machine (Multisort) Hooe/Mehan Feb 14 1946 Dec 10 1946 2 D146028 Card punching machine (Multisort) Hooe/Mehan Feb 14 1946 Dec 10 1946 2 2568350 Actuator control (early entry) Mehan Mar 14 1946 Sep 18 1951 10 2580295 Partial product m/c (dual ten-key) Grigsby/Mehan Jun 3 1947 Dec 25 1951 36 D156261 Indicator for electronic calc Mehan Sep 29 1947 Nov 29 1949 2 D156262 Electronic calculating m/c Mehan Sep 29 1947 Nov 29 1949 2 D156263 Calc m/c full kbd Mehan Jan 19 1948 Nov 29 1949 3 D156264 Calc m/c full kbd wide carriage Mehan Jan 19 1948 Nov 29 1949 4 2550581 Credit balance mechanism Mehan Apr 22 1948 Apr 24 1951 13 2597162 Wide carriage mechanism Mehan/Uhlig May 14 1949 May 20 1952 18 D162377 Calc m/c (Custom) Budlong Jul 1 1950 Mar 13 1951 4 2633967 Decimal indicator BuehlerC May 19 1951 Apr 7 1953 3 2633968 Paper guide Lippert May 19 1951 Apr 7 1953 3 2662473 Changeable type bars Lippert Sep 20 1951 Dec 15 1953 3 2731206 Control key interlocks Lippert/Schultz Sep 20 1951 Jan 17 1956 13 2792176 Motor switch operating mechanism Lippert Sep 20 1951 May 14 1957 12 D173787 Acctg m/c (Victor w/cash drawer) Budlong Oct 29 1953 Jan 4 1955 2 D173788 Acctg m/c (Victor w/cash drawer) Budlong Oct 29 1953 Jan 4 1955 2 2834542 Full-function printing calc Sundstrand Jan 14 1954 May 13 1958 60 2929476 Single-turn clutch Sundstrand Jan 14 1954 Mar 22 1960 5 3024975 Mul/div control mechanism Sundstrand Jan 14 1954 Mar 13 1962 66 3030010 Ten-key printing calculator Sundstrand Jan 14 1954 Apr 17 1962 60 2824688 Simplified pinbox (5 pins) Mehan Aug 17 1954 Feb 25 1958 12 3013717 Electromech controls Mehan5/Hoffman Aug 8 1955 Dec 19 1961 22 2860575 Tag & ticket printing calc Sievers Mar 28 1956 Nov 18 1958 5 2984412 Ten-key printing calc Sundstrand Feb 3 1956 May 16 1961 70 3107849 Sales recording (calc to tape) Johnston Nov 25 1957 Oct 22 1963 13 3029015 Price label printing via calc Bick Mar 19 1959 Apr 10 1962 9 3145651 Ribbon reversing mechanism Schultz Nov 1 1960 Aug 25 1964 8 3186640 Improved control mechanism Schultz Aug 4 1960 Jun 1 1965 15 3107051 Indicator for cash register Hoffman Jan 13 1961 Oct 15 1963 14 3197133 Ten-key calc with recall mech Sundstrand Apr 25 1962 Jul 27 1965 11 3250465 Protection mech (remote control) Look Nov 14 1963 May 10 1966 5 3255960 Mechanical binary/decimal printer Maples Jul 24 1963 Jun 14 1966 11 3363835 Binary printout mechanism Mailer Feb 4 1964 Jan 16 1968 15 3326460 Visual indicator for cash reg Hoffman Jan 10 1966 Jun 20 1967 15 3355099 Pinbox detents (polyurethane) Whippo Mar 21 1966 Nov 28 1967 5 3402884 Function control keys Schultz Jun 7 1966 Sep 24 1968 13 3476313 Ten-key calc with short-cut mult Sundstrand Jul 26 1967 Nov 4 1969 23